. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. pfSense_BUILDER_BINARIES: /sbin/sysctl /sbin/kldload /usr/sbin/tcpdump /sbin/pfctl /bin/rm pfSense_BUILDER_BINARIES: /usr/sbin/inetd pfSense_MODULE: filter */ /* DISABLE_PHP_LINT_CHECKING */ /* holds the items that will be executed *AFTER* the filter is fully loaded */ $after_filter_configure_run = array(); /* For installing cron job of schedules */ $time_based_rules = false; /* Used to hold the interface list that will be used on ruleset creation. */ $FilterIflist = array(); /* Create a global array to avoid errors on rulesets. */ $GatewaysList = array(); /* Used for the hostname dns resolver */ $filterdns = array(); /* Used for aliases and interface macros */ $aliases = ""; function fix_rule_label($descr) { $descr = str_replace('"', '', $descr); if (strlen($descr) > 63) return substr($descr, 0, 60) . "..."; else return $descr; } function is_bogonsv6_used() { global $config, $g; # Only use bogonsv6 table if IPv6 Allow is on, and at least 1 enabled interface also has "blockbogons" enabled. $usebogonsv6 = false; if (isset($config['system']['ipv6allow'])) { foreach ($config['interfaces'] as $ifacedata) { if(isset($ifacedata['enable']) && isset($ifacedata['blockbogons'])) { $usebogonsv6 = true; break; } } } return $usebogonsv6; } function flowtable_configure() { global $config, $g; if (empty($config['system']['flowtable'])) { mwexec("/sbin/sysctl net.inet.flowtable.enable=0", true); return; } // Figure out how many flows we should reserve // sized 2x larger than the number of unique connection destinations. if($config['system']['maximumstates'] <> "" && is_numeric($config['system']['maximumstates'])) $maxstates = $config['system']['maximumstates']; else $maxstates = 150000; // nmbflows cpu count * ($maxstates * 2) $cpus = trim(`/sbin/sysctl -n kern.smp.cpus`, " \n"); $nmbflows = ($cpus*($maxstates*2)); // Flowtable currently only works on 8.0 if(get_freebsd_version() == "8") { mwexec("/sbin/sysctl net.inet.flowtable.nmbflows={$nmbflows}"); mwexec("/sbin/sysctl net.inet.ip.output_flowtable_size={$maxstates}"); mwexec("/sbin/sysctl net.inet.flowtable.enable=1"); } } function filter_pflog_start($kill_first = false) { global $config, $g; if ($g['platform'] == 'jail') return; if(isset($config['system']['developerspew'])) { $mt = microtime(); echo "filter_pflog_start() being called $mt\n"; } mute_kernel_msgs(); $output = 0; $tcpdump_cmd = "tcpdump -s 256 -v -S -l -n -e -ttt -i pflog0"; exec("/bin/pgrep -af '{$tcpdump_cmd}'", $output, $retval); if ($kill_first && ($output[0] > 1)) { mwexec("/bin/kill {$output[0]}"); usleep(1000); /* Ensure the restart below runs */ $retval = 1; } if($retval != 0) mwexec_bg("/usr/sbin/{$tcpdump_cmd} | logger -t pf -p local0.info"); unmute_kernel_msgs(); } /* reload filter async */ function filter_configure() { global $g; if(isset($config['system']['developerspew'])) { $mt = microtime(); echo "filter_configure() being called $mt\n"; } /* * NOTE: Check here for bootup status since this should not be triggered during bootup. * The reason is that rc.bootup calls filter_configure_sync directly which does this too. */ if (!$g['booting']) send_event("filter reload"); } function filter_delete_states_for_down_gateways() { global $config, $GatewaysList; if (isset($config['system']['kill_states'])) return; $any_gateway_down = false; $a_gateways = return_gateways_status(); if (is_array($GatewaysList)) { foreach ($GatewaysList as $gwname => $gateway) { if (empty($gateway['monitor'])) continue; if (!is_ipaddr($gateway['monitor'])) continue; if (strstr($gateway['monitor'], "127.0.0.")) continue; if (empty($a_gateways[$gateway['monitor']])) continue; $gwstatus =& $a_gateways[$gateway['monitor']]; if (strstr($gwstatus['status'], "down")) { $any_gateway_down = true; break; } } } if ($any_gateway_down == true) mwexec("/sbin/pfctl -Fs"); } /* reload filter sync */ function filter_configure_sync($delete_states_if_needed = true) { global $config, $g, $after_filter_configure_run, $FilterIflist; global $time_based_rules, $filterdns, $aliases, $dummynet_name_list; /* Use filter lock to not allow concurrent filter reloads during this run. */ $filterlck = lock('filter', LOCK_EX); filter_pflog_start(); update_filter_reload_status(gettext("Initializing")); /* invalidate interface cache */ get_interface_arr(true); if(isset($config['system']['developerspew'])) { $mt = microtime(); echo "filter_configure_sync() being called $mt\n"; } /* Get interface list to work with. */ filter_generate_optcfg_array(); if($g['booting'] == true) echo gettext("Configuring firewall"); /* generate aliases */ if($g['booting'] == true) echo "."; update_filter_reload_status(gettext("Creating aliases")); $aliases = filter_generate_aliases(); $gateways = filter_generate_gateways(); if($g['booting'] == true) echo "."; update_filter_reload_status(gettext("Generating Limiter rules")); $dummynet_rules = filter_generate_dummynet_rules(); $dummynet_name_list = get_unique_dnqueue_list(); update_filter_reload_status(gettext("Generating NAT rules")); /* generate nat rules */ $natrules = filter_nat_rules_generate(); if($g['booting'] == true) echo "."; update_filter_reload_status(gettext("Generating filter rules")); /* generate pfctl rules */ $pfrules = filter_rules_generate(); /* generate altq, limiter */ if($g['booting'] == true) echo "."; update_filter_reload_status(gettext("Generating ALTQ queues")); $altq_queues = filter_generate_altq_queues(); update_filter_reload_status(gettext("Generating Layer7 rules")); generate_layer7_files(); if($g['booting'] == true) echo "."; update_filter_reload_status(gettext("Loading filter rules")); /* enable pf if we need to, otherwise disable */ if(!isset ($config['system']['disablefilter'])) { mwexec("/sbin/pfctl -e", true); } else { mwexec("/sbin/pfctl -d", true); unlink_if_exists("{$g['tmp_path']}/filter_loading"); update_filter_reload_status(gettext("Filter is disabled. Not loading rules.")); if($g['booting'] == true) echo gettext("done.") . "\n"; unlock($filterlck); return; } $limitrules = ""; /* Define the maximum number of tables the system can handle (should be at least aliases*2+some spare) */ $maxtables = is_numeric($config['system']['maximumtables']) ? $config['system']['maximumtables'] : "3000"; $limitrules .= "set limit tables {$maxtables}\n"; /* User defined maximum table entries in Advanced menu. */ if ($config['system']['maximumtableentries'] <> "" && is_numeric($config['system']['maximumtableentries'])) $limitrules .= "set limit table-entries {$config['system']['maximumtableentries']}\n"; if ($config['system']['optimization'] <> "") { $limitrules .= "set optimization {$config['system']['optimization']}\n"; if($config['system']['optimization'] == "conservative") { $limitrules .= "set timeout { udp.first 300, udp.single 150, udp.multiple 900 }\n"; } } else $limitrules .= "set optimization normal\n"; if (!empty($config['system']['adaptivestart']) && !empty($config['system']['adaptiveend'])) $limitrules .= "set timeout { adaptive.start {$config['system']['adaptivestart']}, adaptive.end {$config['system']['adaptiveend']} }\n"; else $limitrules .= "set timeout { adaptive.start 0, adaptive.end 0 }\n"; if ($config['system']['maximumstates'] <> "" && is_numeric($config['system']['maximumstates'])) { /* User defined maximum states in Advanced menu. */ $limitrules .= "set limit states {$config['system']['maximumstates']}\n"; $limitrules .= "set limit src-nodes {$config['system']['maximumstates']}\n"; } else { $max_states = pfsense_default_state_size(); $limitrules .= "set limit states {$max_states}\n"; $limitrules .= "set limit src-nodes {$max_states}\n"; } if (isset($config['system']['lb_use_sticky']) && is_numeric($config['system']['srctrack']) && ($config['system']['srctrack'] > 0)) $limitrules .= "set timeout src.track {$config['system']['srctrack']}\n"; // Configure flowtable support if enabled. flowtable_configure(); $rules = ""; $rules = "{$limitrules}\n"; $rules .= "{$aliases} \n"; $rules .= "{$gateways} \n"; update_filter_reload_status(gettext("Setting up logging information")); $rules .= filter_setup_logging_interfaces(); $rules .= "\n"; $rules .= "set skip on pfsync0\n"; $rules .= "\n"; update_filter_reload_status(gettext("Setting up SCRUB information")); $rules .= filter_generate_scrubing(); $rules .= "\n"; $rules .= "{$altq_queues}\n"; $rules .= "{$natrules}\n"; $rules .= "{$pfrules}\n"; $rules .= discover_pkg_rules("filter"); unset($aliases, $gateways, $altq_queues, $natrules, $pfrules); // Copy rules.debug to rules.debug.old if(file_exists("{$g['tmp_path']}/rules.debug")) @copy("{$g['tmp_path']}/rules.debug", "{$g['tmp_path']}/rules.debug.old"); if (!@file_put_contents("{$g['tmp_path']}/rules.debug", $rules, LOCK_EX)) { log_error("WARNING: Could not write new rules!"); unlock($filterlck); return; } @file_put_contents("{$g['tmp_path']}/rules.limits", $limitrules); mwexec("/sbin/pfctl -Of {$g['tmp_path']}/rules.limits"); unset($rules, $limitrules); if(isset($config['system']['developerspew'])) { $mt = microtime(); echo "pfctl being called at $mt\n"; } unset($rules_loading, $rules_error); $_grbg = exec("/sbin/pfctl -o basic -f {$g['tmp_path']}/rules.debug 2>&1", $rules_error, $rules_loading); if(isset($config['system']['developerspew'])) { $mt = microtime(); echo "pfctl done at $mt\n"; } /* * check for a error while loading the rules file. if an error has occurred * then output the contents of the error to the caller */ if($rules_loading <> 0) { $saved_line_error = $rules_error[0]; $line_error = explode(":", $rules_error[0]); $line_number = $line_error[1]; $line_split = file("{$g['tmp_path']}/rules.debug"); if(is_array($line_split)) $line_error = sprintf(gettext('The line in question reads [%1$d]: %2$s'), $line_number, $line_split[$line_number-1]); unset($line_split); /* Brutal ugly hack but required -- PF is stuck, unwedge */ if (strstr("$rules_error[0]", "busy")) { exec("/sbin/pfctl -d; /sbin/pfctl -e; /sbin/pfctl -f {$g['tmp_path']}/rules.debug"); $error_msg = gettext("PF was wedged/busy and has been reset."); file_notice("pf_busy", $error_msg, "pf_busy", ""); } else { $_grbg = exec("/sbin/pfctl -o basic -f {$g['tmp_path']}/rules.debug.old 2>&1"); } unset($rules_loading, $rules_error); if ($line_error and $line_number) { file_notice("filter_load", sprintf(gettext('There were error(s) loading the rules: %1$s - %2$s'), $saved_line_error, $line_error), "Filter Reload", ""); update_filter_reload_status(sprintf(gettext('There were error(s) loading the rules: %1$s - %2$s'), $saved_line_error, $line_error)); unlock($filterlck); return; } } # If we are not using bogonsv6 then we can remove any bogonsv6 table from the running pf (if the table is not there, the kill is still fine). if (!is_bogonsv6_used()) $_grbg = exec("/sbin/pfctl -t bogonsv6 -T kill 2>/dev/null"); update_filter_reload_status(gettext("Starting up layer7 daemon")); layer7_start_l7daemon(); if(!empty($filterdns)) { @file_put_contents("{$g['varetc_path']}/filterdns.conf", implode("", $filterdns)); unset($filterdns); if (isvalidpid("{$g['varrun_path']}/filterdns.pid")) sigkillbypid("{$g['varrun_path']}/filterdns.pid", "HUP"); else { /* * FilterDNS has three debugging levels. The default choosen is 1. * Availabe are level 2 and greater then 2. */ if (isset($config['system']['aliasesresolveinterval']) && is_numeric($config['system']['aliasesresolveinterval'])) $resolve_interval = $config['system']['aliasesresolveinterval']; else $resolve_interval = 300; mwexec("/usr/local/sbin/filterdns -p {$g['varrun_path']}/filterdns.pid -i {$resolve_interval} -c {$g['varetc_path']}/filterdns.conf -d 1"); } } else { killbypid("{$g['varrun_path']}/filterdns.pid"); @unlink("{$g['varrun_path']}/filterdns.pid"); } /* run items scheduled for after filter configure run */ $fda = fopen("{$g['tmp_path']}/commands.txt", "w"); if($fda) { if($after_filter_configure_run) { foreach($after_filter_configure_run as $afcr) fwrite($fda, $afcr . "\n"); unset($after_filter_configure_run); } /* * we need a way to let a user run a shell cmd after each * filter_configure() call. run this xml command after * each change. */ if($config['system']['afterfilterchangeshellcmd'] <> "") fwrite($fda, $config['system']['afterfilterchangeshellcmd'] . "\n"); fclose($fda); } if(file_exists("{$g['tmp_path']}/commands.txt")) { mwexec("sh {$g['tmp_path']}/commands.txt &"); unlink("{$g['tmp_path']}/commands.txt"); } /* if time based rules are enabled then swap in the set */ if($time_based_rules == true) filter_tdr_install_cron(true); else filter_tdr_install_cron(false); if($g['booting'] == true) echo "."; if($delete_states_if_needed) { update_filter_reload_status(gettext("Processing down interface states")); filter_delete_states_for_down_gateways(); } update_filter_reload_status(gettext("Running plugins")); if(is_dir("/usr/local/pkg/pf/")) { /* process packager manager custom rules */ update_filter_reload_status(gettext("Running plugins (pf)")); run_plugins("/usr/local/pkg/pf/"); update_filter_reload_status(gettext("Plugins completed.")); } update_filter_reload_status(gettext("Done")); if($g['booting'] == true) echo gettext("done.") . "\n"; unlock($filterlck); return 0; } function filter_generate_scrubing() { global $config, $FilterIflist; $scrubrules = ""; if (isset($config['system']['maxmss_enable'])) { $maxmss = 1400; if (!empty($config['system']['maxmss'])) $maxmss = $config['system']['maxmss']; $scrubrules .= "scrub from any to max-mss {$maxmss}\n"; } /* disable scrub option */ foreach ($FilterIflist as $scrubif => $scrubcfg) { if(isset($scrubcfg['virtual']) || empty($scrubcfg['descr'])) continue; /* set up MSS clamping */ if($scrubcfg['mss'] <> "" && is_numeric($scrubcfg['mss']) && $scrubcfg['if'] != "pppoe" && $scrubcfg['if'] != "pptp" && $scrubif['if'] != "l2tp") $mssclamp = "max-mss " . (intval($scrubcfg['mss'] - 40)); else $mssclamp = ""; /* configure no-df for linux nfs and others */ if($config['system']['scrubnodf']) $scrubnodf = "no-df"; else $scrubnodf = ""; if($config['system']['scrubrnid']) $scrubrnid = "random-id"; else $scrubrnid = ""; if(!isset($config['system']['disablescrub'])) $scrubrules .= "scrub on \${$scrubcfg['descr']} all {$scrubnodf} {$scrubrnid} {$mssclamp} fragment reassemble\n"; // reassemble all directions else if(!empty($mssclamp)) $scrubrules .= "scrub on \${$scrubcfg['descr']} {$mssclamp}\n"; } return $scrubrules; } function filter_generate_nested_alias($name, $alias, &$aliasnesting, &$aliasaddrnesting, $all = false) { global $aliastable, $filterdns; $addresses = explode(" ", $alias); $finallist = ""; $builtlist = ""; $urltable_nesting = ""; $aliasnesting[$name] = $name; foreach ($addresses as $address) { if (empty($address)) continue; $linelength = strlen($builtlist); $tmpline = ""; if(is_alias($address)) { if (alias_get_type($address) == 'urltable') { // Feature#1603. For this type of alias we do not need to recursively call filter_generate_nested_alias. Just load IPs from the file. $urltable_netsting = alias_expand_urltable($address); if (!empty($urltable_nesting)) { $urlfile_as_arr = file($urltable_nesting); foreach($urlfile_as_arr as $line) { $address= rtrim($line); if ((strlen($tmpline) + $linelength) > 4036) { $finallist .= "{$tmpline} \\\n"; $tmpline = ""; } $tmpline .= " {$address}"; } } } /* We already expanded this alias so there is no neccessity to do it again. */ else if(!isset($aliasnesting[$address])) $tmpline = filter_generate_nested_alias($name, $aliastable[$address], $aliasnesting, $aliasaddrnesting, $all); } else if(!isset($aliasaddrnesting[$address])) { if ($all === false && !is_ipaddr($address) && !is_subnet($address) && !is_port($address) && is_hostname($address)) { if (!isset($filterdns["{$address}{$name}"])) $filterdns["{$address}{$name}"] = "pf {$address} {$name}\n"; continue; } $aliasaddrnesting[$address] = $address; $tmpline = " {$address}"; } if ((strlen($tmpline)+ $linelength) > 4036) { $finallist .= "{$builtlist} \\\n"; $builtlist = ""; } if (!empty($tmpline)) $builtlist .= " {$tmpline}"; } $finallist .= $builtlist; return $finallist; } function filter_expand_alias($alias_name, $all = false) { global $config; if(isset($config['aliases']['alias'])) { foreach ($config['aliases']['alias'] as $aliased) { if($aliased['name'] == $alias_name) { $aliasnesting = array(); $aliasaddrnesting = array(); return filter_generate_nested_alias($aliased['name'], $aliased['address'], $aliasnesting, $aliasaddrnesting, $all); } } } } function filter_expand_alias_array($alias_name, $all = false) { $expansion = filter_expand_alias($alias_name, $all); return explode(" ", preg_replace('/\s+/', ' ', trim($expansion))); } function filter_generate_aliases() { global $config, $FilterIflist, $after_filter_configure_run; if(isset($config['system']['developerspew'])) { $mt = microtime(); echo "filter_generate_aliases() being called $mt\n"; } $alias = "#System aliases\n "; $aliases = "loopback = \"{ lo0 }\"\n"; foreach ($FilterIflist as $if => $ifcfg) { if (is_array($ifcfg[0])) { if ($ifcfg[0]['if'] == 'pppoe') { $aliases .= "{$ifcfg[0]['descr']} = \"{ {$ifcfg[0]['if']}"; $aliases .= " }\"\n"; } } elseif (!empty($ifcfg['descr']) && !empty($ifcfg['if'])) { if ($ifcfg['type6'] == '6rd') $aliases .= "{$ifcfg['descr']} = \"{ {$ifcfg['if']} {$if}_stf"; else if ($ifcfg['type6'] == '6to4') $aliases .= "{$ifcfg['descr']} = \"{ {$ifcfg['if']} {$if}_stf"; else { $aliases .= "{$ifcfg['descr']} = \"{ {$ifcfg['if']}"; if ($ifcfg['type'] == 'pptp') { foreach (get_parent_interface($ifcfg['if']) as $parent_if) { if ($parent_if != $ifcfg['if']) { $aliases .= " {$parent_if}"; } } } } $aliases .= " }\"\n"; } } $aliases .= "\n#SSH Lockout Table\n"; $aliases .= "table persist\n"; $aliases .= "table persist\n"; $aliases .= "#Snort tables\n"; $aliases .= "table \n"; $aliases .= "table \n"; if (!file_exists("/etc/bogons")) @file_put_contents("/etc/bogons", ""); if (!file_exists("/etc/bogonsv6")) @file_put_contents("/etc/bogonsv6", ""); $aliases .= "table persist file \"/etc/bogons\"\n"; if (is_bogonsv6_used()) $aliases .= "table persist file \"/etc/bogonsv6\"\n"; $vpns_list = filter_get_vpns_list(); if($vpns_list) $aliases .= "table { $vpns_list }\n"; /* add a Negate_networks table */ $aliases .= "table "; if($vpns_list) $aliases .= "{ $vpns_list }"; $aliases .= "\n"; $aliases .= "\n# User Aliases \n"; /* Setup pf groups */ if(isset($config['aliases']['alias'])) { foreach ($config['aliases']['alias'] as $aliased) { $extralias = ""; /* * XXX: i am not sure what this does so i am commenting it out for now, because as it is * its quite dangerous! * $ip = find_interface_ip($aliased['address']); * $extraalias = " " . link_ip_to_carp_interface($ip); */ $aliasnesting = array(); $aliasaddrnesting = array(); $addrlist = filter_generate_nested_alias($aliased['name'], $aliased['address'], $aliasnesting, $aliasaddrnesting); switch ($aliased['type']) { case "host": case "network": case "url": $tableaddrs = "{$addrlist}{$extralias}"; if(empty($tableaddrs)) { $aliases .= "table <{$aliased['name']}> persist\n"; if (empty($aliased['address'])) $after_filter_configure_run[] = "/sbin/pfctl -T flush -t " . escapeshellarg($aliased['name']); } else $aliases .= "table <{$aliased['name']}> { {$addrlist}{$extralias} } \n"; $aliases .= "{$aliased['name']} = \"<{$aliased['name']}>\"\n"; break; case "openvpn": $openvpncfg = array(); if($config['openvpn']['user']) { /* XXX: Check if we have a correct ip? */ foreach ($config['openvpn']['user'] as $openvpn) $openvpncfg[$openvpn['name']] = $openvpn['ip']; } $vpn_lines = explode("\n", $addrlist); foreach ($vpn_lines as $vpn_line) { $vpn_address_split = explode(" ", $vpn_line); foreach($vpn_address_split as $vpnsplit) { if(isset($openvpncfg[$vpnsplit])) { $newaddress .= " "; $newaddress .= $openvpn[$vpnsplit]; break; } } } $aliases .= "table <{$aliased['name']}> { {$newaddress}{$extralias} } \n"; $aliases .= "{$aliased['name']} = \"<{$aliased['name']}>\"\n"; break; case "urltable": $urlfn = alias_expand_urltable($aliased['name']); if ($urlfn) { $aliases .= "table <{$aliased['name']}> persist file \"{$urlfn}\"\n"; $aliases .= "{$aliased['name']} = \"<{$aliased['name']}>\"\n"; } break; case "port": $aliases .= "{$aliased['name']} = \"{ {$addrlist} }\"\n"; break; default: $aliases .= "{$aliased['name']} = \"{ {$aliased['address']}{$extralias} }\"\n"; break; } } } $result = "{$alias} \n"; $result .= "{$aliases}"; return $result; } function filter_generate_gateways() { global $config, $g, $GatewaysList; $rules = "# Gateways\n"; update_filter_reload_status(gettext("Creating gateway group item...")); /* Lookup Gateways to be used in filter rules once */ $GatewaysList = return_gateways_array(); $GatewayGroupsList = return_gateway_groups_array(); if (is_array($GatewaysList)) { foreach ($GatewaysList as $gwname => $gateway) { $int = $gateway['interface']; $gwip = $gateway['gateway']; $route = ""; if (!is_ipaddr($gwip)) $gwip = get_interface_gateway($gateway['friendlyiface']); if (is_ipaddr($gwip) && !empty($int)) $route = "route-to ( {$int} {$gwip} )"; if (($route === "") && isset($config['system']['skip_rules_gw_down'])) unset($GatewaysList[$gwname]); else $rules .= "GW{$gwname} = \" {$route} \"\n"; } } if (is_array($GatewayGroupsList)) { foreach ($GatewayGroupsList as $gateway => $members) { $route = ""; /* hey, that's not a group member! */ unset($members['ipprotocol']); if (count($members) > 0) { $foundlb = 0; $routeto = ""; foreach($members as $idx => $member) { $int = $member['int']; $gatewayip = $member['gwip']; if (($int <> "") && is_ipaddr($gatewayip)) { if ($g['debug']) log_error(sprintf(gettext('Setting up route with %1$s on %2$s'), $gatewayip, $int)); if ($member['weight'] > 1) { $routeto .= str_repeat("( {$int} {$gatewayip} ) ", $member['weight']); } else $routeto .= "( {$int} {$gatewayip} ) "; $foundlb++; } else log_error(sprintf(gettext("An error occurred while trying to find the interface got %s . The rule has not been added."), $gatewayip)); } $route = ""; if ($foundlb > 0) { $route = " route-to { {$routeto} } "; if($foundlb > 1) { $route .= " round-robin "; if (isset($config['system']['lb_use_sticky'])) $route .= " sticky-address "; } } } if (($route === "") && isset($config['system']['skip_rules_gw_down'])) unset($GatewayGroupsList[$gateway]); else $rules .= "GW{$gateway} = \" {$route} \"\n"; } } /* Create a global array to avoid errors on rulesets. */ $GatewaysList = $GatewaysList + $GatewayGroupsList; $rules .= "\n"; return $rules; } /* returns space separated list of vpn subnets */ function filter_get_vpns_list() { global $config; $vpns = ""; $vpns_arr = array(); /* ipsec */ if (isset($config['ipsec']['enable'])) { if (is_array($config['ipsec']['phase2'])) { foreach ($config['ipsec']['phase2'] as $ph2ent) { if ((!$ph2ent['mobile']) && ($ph2ent['mode'] != 'transport')) { if (!function_exists('ipsec_idinfo_to_cidr')) require_once("ipsec.inc"); if (!is_array($ph2ent['remoteid'])) continue; $ph2ent['remoteid']['mode'] = $ph2ent['mode']; $vpns_subnet = ipsec_idinfo_to_cidr($ph2ent['remoteid']); if ($vpns_subnet == "0.0.0.0/0") continue; $vpns_arr[] = $vpns_subnet; } } } } /* openvpn */ foreach (array('client', 'server') as $type) { if(is_array($config['openvpn']["openvpn-$type"])) { foreach ($config['openvpn']["openvpn-$type"] as $settings) { if(is_array($settings)) { if (!isset($settings['disable'])) { $remote_networks = explode(',', $settings['remote_network']); foreach ($remote_networks as $remote_network) { if (is_subnet($remote_network) && ($remote_network <> "0.0.0.0/0")) $vpns_arr[] = $remote_network; } if (is_subnet($settings['tunnel_network']) && $settings['tunnel_network'] <> "0.0.0.0/0") $vpns_arr[] = $settings['tunnel_network']; } } } } } /* pppoe */ if (is_array($config['pppoes']['pppoe'])) { foreach($config['pppoes']['pppoe'] as $pppoe) { if ($pppoe['mode'] == "server") { if(is_ipaddr($pppoe['remoteip'])) { $pppoesub = gen_subnet($pppoe['remoteip'], $pppoe['pppoe_subnet']); if (is_subnet($pppoesub)) $vpns_arr[] = $pppoesub; } } } } if (!empty($vpns_arr)) $vpns = implode(" ", $vpns_arr); return $vpns; } /* returns space separated list of directly connected networks * optionally returns an array instead, including friendly interface and gateway (if applicable) */ function filter_get_direct_networks_list($returnsubnetsonly = true) { global $config, $FilterIflist, $GatewaysList; /* build list of directly connected interfaces and networks */ $networks = ""; $networks_arr = array(); if(empty($FilterIflist)) { filter_generate_optcfg_array(); } foreach ($FilterIflist as $ifent => $ifcfg) { $subnet = "{$ifcfg['sa']}/{$ifcfg['sn']}"; if(is_subnet($subnet)) { if($returnsubnetsonly) { $networks_arr[] = $subnet; } else { $networks_arr[] = array( 'subnet' => $subnet, 'if' => $ifent, 'ip' => $ifcfg['ip']); } } } foreach(get_configured_ip_aliases_list(true) as $vip) { $subnet = "{$vip['subnet']}/{$vip['subnet_bits']}"; if(is_subnet($subnet) && !(is_subnetv4($subnet) && $vip['subnet_bits'] == 32) && !(is_subnetv6($subnet) && $vip['subnet_bits'] == 128)) { if(is_subnetv4($subnet)) $subnet = gen_subnet($vip['subnet'], $vip['subnet_bits']) . "/{$vip['subnet_bits']}"; else if(is_subnetv6($subnet)) $subnet = gen_subnetv6($vip['subnet'], $vip['subnet_bits']) . "/{$vip['subnet_bits']}"; if($returnsubnetsonly) { $networks_arr[] = $subnet; } else { $networks_arr[] = array( 'subnet' => $subnet, 'if' => $vip['interface'], 'ip' => $vip['subnet']); } } } foreach(get_staticroutes() as $netent) { if(is_subnet($netent['network'])) { if($returnsubnetsonly) { $networks_arr[] = $netent['network']; } else if(isset($GatewaysList[$netent['gateway']])) { $networks_arr[] = array( 'subnet' => $netent['network'], 'if' => $GatewaysList[$netent['gateway']]['friendlyiface'], 'gateway' => $GatewaysList[$netent['gateway']]['gateway']); } } } if($returnsubnetsonly) { if(!empty($networks_arr)) { $networks = implode(" ", $networks_arr); } return $networks; } else { return $networks_arr; } } function filter_generate_optcfg_array() { global $config, $FilterIflist; if(isset($config['system']['developerspew'])) { $mt = microtime(); echo "filter_generate_optcfg_array() being called $mt\n"; } read_layer7_config(); /* if list */ $iflist = get_configured_interface_with_descr(); foreach ($iflist as $if => $ifdetail) { $oc = $config['interfaces'][$if]; $oic = array(); $oic['if'] = get_real_interface($if); if (!does_interface_exist($oic['if'])) continue; $oic['ifv6'] = get_real_interface($if, "inet6"); $oic['ip'] = get_interface_ip($if); $oic['ipv6'] = get_interface_ipv6($if); if(!is_ipaddrv4($oc['ipaddr']) && !empty($oc['ipaddr'])) $oic['type'] = $oc['ipaddr']; if(!is_ipaddrv6($oc['ipaddrv6']) && !empty($oc['ipaddrv6'])) $oic['type6'] = $oc['ipaddrv6']; if (!empty($oc['track6-interface'])) $oic['track6-interface'] = $oc['track6-interface']; $oic['sn'] = get_interface_subnet($if); $oic['snv6'] = get_interface_subnetv6($if); $oic['mtu'] = empty($oc['mtu']) ? 1500 : $oc['mtu']; $oic['mss'] = empty($oc['mss']) ? '' : $oc['mss']; $oic['descr'] = $ifdetail; $oic['sa'] = gen_subnet($oic['ip'], $oic['sn']); $oic['sav6'] = gen_subnetv6($oic['ipv6'], $oic['snv6']); $oic['nonat'] = $oc['nonat']; $oic['alias-address'] = $oc['alias-address']; $oic['alias-subnet'] = $oc['alias-subnet']; $oic['gateway'] = $oc['gateway']; $oic['gatewayv6'] = $oc['gatewayv6']; $oic['spoofcheck'] = "yes"; $oic['bridge'] = link_interface_to_bridge($if); $vips = link_interface_to_vips($if); if (!empty($vips)) { foreach ($vips as $vipidx => $vip) { if (is_ipaddrv4($vip['subnet'])) { if (!is_array($oic['vips'])) $oic['vips'] = array(); $oic['vips'][$vipidx]['ip'] = $vip['subnet']; if (empty($vip['subnet_bits'])) $oic['vips'][$vipidx]['sn'] = 32; else $oic['vips'][$vipidx]['sn'] = $vip['subnet_bits']; } else if (is_ipaddrv6($vip['subnet'])) { if (!is_array($oic['vips6'])) $oic['vips6'] = array(); $oic['vips6'][$vipidx]['ip'] = $vip['subnet']; if (empty($vip['subnet_bits'])) $oic['vips6'][$vipidx]['sn'] = 128; else $oic['vips6'][$vipidx]['sn'] = $vip['subnet_bits']; } } } unset($vips); $FilterIflist[$if] = $oic; } if($config['pptpd']['mode'] == "server" || $config['pptpd']['mode'] == "redir") { $oic = array(); $oic['if'] = 'pptp'; $oic['descr'] = 'pptp'; $oic['ip'] = $config['pptpd']['localip']; $oic['sa'] = $config['pptpd']['remoteip']; $oic['mode'] = $config['pptpd']['mode']; $oic['virtual'] = true; if($config['pptpd']['pptp_subnet'] <> "") $oic['sn'] = $config['pptpd']['pptp_subnet']; else $oic['sn'] = "32"; $FilterIflist['pptp'] = $oic; } if($config['l2tp']['mode'] == "server") { $oic = array(); $oic['if'] = 'l2tp'; $oic['descr'] = 'L2TP'; $oic['ip'] = $config['l2tp']['localip']; $oic['sa'] = $config['l2tp']['remoteip']; if($config['l2tp']['l2tp_subnet'] <> "") $oic['sn'] = $config['l2tp']['l2tp_subnet']; else $oic['sn'] = "32"; $oic['mode'] = $config['l2tp']['mode']; $oic['virtual'] = true; $FilterIflist['l2tp'] = $oic; } if (is_array($config['pppoes']['pppoe']) && (count($config['pppoes']['pppoe']) > 0)) { $pppoeifs = array(); foreach($config['pppoes']['pppoe'] as $pppoe) { if ($pppoe['mode'] == "server") { $oic = array(); $oic['if'] = 'pppoe'; $oic['descr'] = 'pppoe'; $oic['ip'] = $pppoe['localip']; $oic['sa'] = $pppoe['remoteip']; $oic['mode'] = $pppoe['mode']; $oic['virtual'] = true; if($pppoe['pppoe_subnet'] <> "") $oic['sn'] = $pppoe['pppoe_subnet']; else $oic['sn'] = "32"; $pppoeifs[] = $oic; } } if (count($pppoeifs)) $FilterIflist['pppoe'] = $pppoeifs; } /* add ipsec interfaces */ if(isset($config['ipsec']['enable']) || isset($config['ipsec']['client']['enable'])) { $oic = array(); $oic['if'] = 'enc0'; $oic['descr'] = 'IPsec'; $oic['type'] = "none"; $oic['virtual'] = true; $FilterIflist['enc0'] = $oic; } /* add openvpn interfaces */ if($config['openvpn']['openvpn-server'] || $config['openvpn']['openvpn-client']) { $oic = array(); $oic['if'] = "openvpn"; $oic['descr'] = 'OpenVPN'; $oic['type'] = "none"; $oic['virtual'] = true; $FilterIflist['openvpn'] = $oic; } /* add interface groups */ if(is_array($config['ifgroups']['ifgroupentry'])) { foreach($config['ifgroups']['ifgroupentry'] as $ifgen) { $oc = array(); $oc['if'] = $ifgen['ifname']; $oc['descr'] = $ifgen['ifname']; $oc['virtual'] = true; $FilterIflist[$ifgen['ifname']] = $oc; } } } function filter_flush_nat_table() { global $config, $g; if(isset($config['system']['developerspew'])) { $mt = microtime(); echo "filter_flush_nat_table() being called $mt\n"; } return mwexec("/sbin/pfctl -F nat"); } function filter_flush_state_table() { return mwexec("/sbin/pfctl -F state"); } function filter_get_reflection_interfaces($natif = "") { global $FilterIflist; $nat_if_list = array(); foreach ($FilterIflist as $ifent => $ifname) { if($ifname['if'] == $natif) continue; /* Do not add reflection redirects for interfaces with gateways */ if(interface_has_gateway($ifent)) continue; $nat_if_list[] = $ifname['if']; } return $nat_if_list; } function filter_generate_reflection_nat($rule, &$route_table, $nat_ifs, $protocol, $target, $target_ip, $target_subnet = "") { global $config, $FilterIflist; if(!isset($config['system']['enablenatreflectionhelper'])) return ""; // Initialize natrules holder string $natrules = ""; update_filter_reload_status(sprintf(gettext("Creating reflection NAT rule for %s..."), $rule['descr'])); /* TODO: Add this option to port forwards page. */ if(isset($rule['staticnatport'])) { $static_port = " static-port"; } else { $static_port = " port 1024:65535"; } if(!empty($protocol)) { $protocol_text = " proto {$protocol}"; } else { $protocol_text = ""; } if(empty($target_subnet) || !is_numeric($target_subnet)) $target_subnet = 32; if(!is_array($route_table)) { /* get a simulated IPv4-only route table based on the config */ $route_table = filter_get_direct_networks_list(false); foreach($route_table as $rt_key => $rt_ent) { if(!is_subnetv4($rt_ent['subnet'])) unset($route_table[$rt_key]); if(isset($route_table[$rt_key]) && isset($FilterIflist[$rt_ent['if']]['if'])) $route_table[$rt_key]['if'] = $FilterIflist[$rt_ent['if']]['if']; } } /* Check if the target is accessed through a static route */ foreach($route_table as $route) { if(isset($route['gateway']) && is_ipaddr($route['gateway'])) { $subnet_split = explode("/", $route['subnet']); if(in_array($route['if'], $nat_ifs) && check_subnets_overlap($target_ip, $target_subnet, $subnet_split[0], $subnet_split[1])) { $target_ip = $route['gateway']; $target_subnet = 32; break; } } } /* Search for matching subnets in the routing table */ foreach($route_table as $route) { $subnet = $route['subnet']; $subnet_split = explode("/", $subnet); $subnet_if = $route['if']; if(in_array($subnet_if, $nat_ifs) && check_subnets_overlap($target_ip, $target_subnet, $subnet_split[0], $subnet_split[1])) { $ifsubnet_ip = ""; /* Find interface IP to use for NAT */ foreach ($route_table as $ifnetwork) { if(isset($ifnetwork['ip']) && is_ipaddr($ifnetwork['ip']) && $ifnetwork['if'] == $subnet_if && ip_in_subnet($ifnetwork['ip'], $subnet)) { $ifsubnet_ip = $ifnetwork['ip']; break; } } if(!empty($ifsubnet_ip)) { $subnets = array($subnet); /* Find static routes that also need to be referenced in the NAT rule */ foreach($route_table as $rtentry) { if(isset($rtentry['gateway']) && is_ipaddr($rtentry['gateway']) && $rtentry['if'] == $subnet_if && ip_in_subnet($rtentry['gateway'], $subnet)) $subnets[] = $rtentry['subnet']; } if(count($subnets) > 1) $subnet = "{ " . implode(" ", $subnets) . " }"; $natrules .= "no nat on {$subnet_if}{$protocol_text} from {$subnet_if} to {$target}\n"; $natrules .= "nat on {$subnet_if}{$protocol_text} from {$subnet} to {$target} -> {$ifsubnet_ip}{$static_port}\n"; } } } if(!empty($natrules)) $natrules .= "\n"; return $natrules; } function filter_generate_reflection_proxy($rule, $nordr, $rdr_ifs, $srcaddr, $dstaddr_port, &$starting_localhost_port, &$reflection_txt) { global $FilterIflist, $config; // Initialize natrules holder string $natrules = ""; $reflection_txt = array(); if(!empty($rdr_ifs)) { if($config['system']['reflectiontimeout']) $reflectiontimeout = $config['system']['reflectiontimeout']; else $reflectiontimeout = "2000"; update_filter_reload_status(sprintf(gettext("Creating reflection rule for %s..."), $rule['descr'])); $rdr_if_list = implode(" ", $rdr_ifs); if(count($rdr_ifs) > 1) $rdr_if_list = "{ {$rdr_if_list} }"; $natrules .= "\n# Reflection redirects\n"; $localport = $rule['local-port']; if(!empty($localport) && is_alias($localport)) { $localport = filter_expand_alias($localport); $localport = explode(" ", trim($localport)); // The translation port for rdr, when specified, does not support more than one port or range. // Emulating for behavior consistent with the original port forward. $localport = $localport[0]; } if(is_alias($rule['destination']['port'])) { if(empty($localport) || $rule['destination']['port'] == $rule['local-port']) { $dstport = filter_expand_alias($rule['destination']['port']); $dstport = array_filter(explode(" ", trim($dstport))); $localport = ""; } else if(!empty($localport)) { $dstport = array($localport); } } else { $dstport = array(str_replace("-", ":", $rule['destination']['port'])); $dstport_split = explode(":", $dstport[0]); if(!empty($localport) && $dstport_split[0] != $rule['local-port']) { if(!is_alias($rule['local-port']) && $dstport_split[1] && $dstport_split[0] != $dstport_split[1]) { $localendport = $localport + ($dstport_split[1] - $dstport_split[0]); $localport .= ":$localendport"; } $dstport = array($localport); } else $localport = ""; } $dstaddr = explode(" ", $dstaddr_port); if($dstaddr[2]) { $rflctintrange = array_pop($dstaddr); array_pop($dstaddr); } else return ""; $dstaddr = implode(" ", $dstaddr); if(empty($dstaddr) || trim($dstaddr) == "0.0.0.0" || strtolower(trim($dstaddr)) == "port") return ""; if(isset($rule['destination']['any'])) { if(!$rule['interface']) $natif = "wan"; else $natif = $rule['interface']; if(!isset($FilterIflist[$natif])) return ""; if(is_ipaddr($FilterIflist[$natif]['ip'])) $dstaddr = $FilterIflist[$natif]['ip']; else return ""; if(!empty($FilterIflist[$natif]['sn'])) $dstaddr = gen_subnet($dstaddr, $FilterIflist[$natif]['sn']) . '/' . $FilterIflist[$natif]['sn']; } switch($rule['protocol']) { case "tcp/udp": $protocol = "{ tcp udp }"; $reflect_protos = array('tcp', 'udp'); break; case "tcp": case "udp": $protocol = $rule['protocol']; $reflect_protos = array($rule['protocol']); break; default: return ""; break; } if(!empty($nordr)) { $natrules .= "no rdr on {$rdr_if_list} proto {$protocol} from {$srcaddr} to {$dstaddr} port {$rflctintrange}\n"; return $natrules; } if (is_alias($rule['target'])) $target = filter_expand_alias($rule['target']); else if(is_ipaddr($rule['target'])) $target = $rule['target']; else if (is_ipaddr($FilterIflist[$rule['target']]['ip'])) $target = $FilterIflist[$rule['target']]['ip']; else return ""; $starting_localhost_port_tmp = $starting_localhost_port; $toomanyports = false; /* only install reflection rules for < 19991 items */ foreach($dstport as $loc_pt) { if($starting_localhost_port < 19991) { $toadd_array = array(); $inetdport = $starting_localhost_port; $rflctrange = $starting_localhost_port; $loc_pt = explode(":", $loc_pt); if($loc_pt[1] && $loc_pt[1] > $loc_pt[0]) $delta = $loc_pt[1] - $loc_pt[0]; else $delta = 0; if(($inetdport + $delta + 1) - $starting_localhost_port_tmp > 500) { log_error("Not installing NAT reflection rules for a port range > 500"); $inetdport = $starting_localhost_port; $toadd_array = array(); $toomanyports = true; break; } else if(($inetdport + $delta) > 19990) { log_error("Installing partial NAT reflection rules. Maximum 1,000 reached."); $delta = 19990 - $inetdport; $loc_pt[1] = $loc_pt[0] + $delta; if($delta == 0) unset($loc_pt[1]); $toomanyports = true; if(!empty($localport)) { if(is_alias($rule['destination']['port'])) { $rflctintrange = alias_expand($rule['destination']['port']); } else { if($dstport_split[1]) $dstport_split[1] = $dstport_split[0] + $inetdport + $delta - $starting_localhost_port; $rflctintrange = implode(":", $dstport_split); } } } if(empty($localport)) $rflctintrange = implode(":", $loc_pt); if($inetdport + $delta > $starting_localhost_port) $rflctrange .= ":" . ($inetdport + $delta); $starting_localhost_port = $inetdport + $delta + 1; $toadd_array = array_merge($toadd_array, range($loc_pt[0], $loc_pt[0] + $delta)); if(!empty($toadd_array)) { $rtarget = explode(" ", trim($target)); foreach($toadd_array as $tda) { if (empty($tda)) continue; foreach($reflect_protos as $reflect_proto) { if($reflect_proto == "udp") { $socktype = "dgram"; $dash_u = "-u "; $wait = "wait\t"; } else { $socktype = "stream"; $dash_u = ""; $wait = "nowait/0"; } foreach ($rtarget as $targip) { if (empty($targip)) continue; $reflection_txt[] = "{$inetdport}\t{$socktype}\t{$reflect_proto}\t{$wait}\tnobody\t/usr/bin/nc\tnc {$dash_u}-w {$reflectiontimeout} {$targip} {$tda}\n"; } } $inetdport++; } $natrules .= "rdr on {$rdr_if_list} proto {$protocol} from {$srcaddr} to {$dstaddr} port {$rflctintrange} tag PFREFLECT -> 127.0.0.1 port {$rflctrange}\n"; } } if($toomanyports) break; } $reflection_txt = array_unique($reflection_txt); } return $natrules; } /* Generate a 'nat on' or 'no nat on' rule for given interface */ function filter_nat_rules_generate_if($if, $src = "any", $srcport = "", $dst = "any", $dstport = "", $natip = "", $natport = "", $nonat = false, $staticnatport = false, $proto = "", $poolopts = "") { global $config, $FilterIflist; /* XXX: billm - any idea if this code is needed? */ if($src == "/32" || $src{0} == "/") return "# src incorrectly specified\n"; if($natip != "") { if (is_subnet($natip)) $tgt = $natip; elseif (is_alias($natip)) $tgt = "\${$natip}"; else $tgt = "{$natip}/32"; } else { $natip = get_interface_ip($if); if(is_ipaddr($natip)) $tgt = "{$natip}/32"; else $tgt = "(" . $FilterIflist[$if]['if'] . ")"; } /* Add the protocol, if defined */ if (!empty($proto) && $proto != "any") { if ($proto == "tcp/udp") $protocol = " proto { tcp udp }"; else $protocol = " proto {$proto}"; } else $protocol = ""; /* Set tgt for IPv6 */ if ($proto == "ipv6") { $natip = get_interface_ipv6($if); if(is_ipaddrv6($natip)) $tgt = "{$natip}/128"; } /* Add the hard set source port (useful for ISAKMP) */ if($natport != "") $tgt .= " port {$natport}"; /* sometimes this gets called with "" instead of a value */ if($src == "") $src = "any"; /* Match on this source port */ if($srcport != "") { $srcportexpand = alias_expand($srcport); if(!$srcportexpand) $srcportexpand = $srcport; $src .= " port {$srcportexpand}"; } /* sometimes this gets called with "" instead of a value */ if($dst == "") $dst = "any"; /* Match on this dest port */ if($dstport != "") { $dstportexpand = alias_expand($dstport); if(!$dstportexpand) $dstportexpand = $dstport; $dst .= " port {$dstportexpand}"; } /* outgoing static-port option, hamachi, Grandstream, VOIP, etc */ $staticnatport_txt = ""; if($staticnatport) $staticnatport_txt = "static-port"; elseif(!$natport) $tgt .= " port 1024:65535"; // set source port range /* Allow for negating NAT entries */ if($nonat) { $nat = "no nat"; $target = ""; $staticnatport_txt = ""; $poolopts = ""; } else { $nat = "nat"; $target = "-> {$tgt}"; } $if_friendly = $FilterIflist[$if]['descr']; /* Put all the pieces together */ if($if_friendly) $natrule = "{$nat} on \${$if_friendly} {$protocol} from {$src} to {$dst} {$target} {$poolopts} {$staticnatport_txt}\n"; else $natrule .= "# Could not convert {$if} to friendly name(alias)\n"; return $natrule; } function filter_nat_rules_generate() { global $config, $g, $after_filter_configure_run, $FilterIflist, $GatewaysList, $aliases; $natrules = "no nat proto carp\n"; $natrules .= "no rdr proto carp\n"; $natrules .= "nat-anchor \"natearly/*\"\n"; $natrules .= "nat-anchor \"natrules/*\"\n\n"; update_filter_reload_status(gettext("Creating 1:1 rules...")); $reflection_txt = ""; $route_table = ""; /* any 1:1 mappings? */ if(is_array($config['nat']['onetoone'])) { foreach ($config['nat']['onetoone'] as $rule) { if (isset($rule['disabled'])) continue; $sn = ""; $sn1 = ""; $target = alias_expand($rule['external']); if (!$target) { $natrules .= "# Unresolvable alias {$rule['target']}\n"; continue; /* unresolvable alias */ } if (!$rule['interface']) $natif = "wan"; else $natif = $rule['interface']; if (!isset($FilterIflist[$natif])) continue; $srcaddr = filter_generate_address($rule, 'source'); $dstaddr = filter_generate_address($rule, 'destination'); if(!$dstaddr) $dstaddr = $FilterIflist[$natif]['ip']; $srcaddr = trim($srcaddr); $dstaddr = trim($dstaddr); $tmp = explode('/', $srcaddr); $srcip = $tmp[0]; if (!empty($tmp[1]) && is_numeric($tmp[1])) { $sn = $tmp[1]; $sn1 = "/{$sn}"; } $natif = $FilterIflist[$natif]['if']; /* * If reflection is enabled, turn on extra redirections * for this rule by adding other interfaces to an rdr rule. */ if ((isset($config['system']['enablebinatreflection']) || $rule['natreflection'] == "enable") && $rule['natreflection'] != "disable") $nat_if_list = filter_get_reflection_interfaces($natif); else $nat_if_list = array(); $natrules .= "binat on {$natif} from {$srcaddr} to {$dstaddr} -> {$target}{$sn1}\n"; if (!empty($nat_if_list)) { $binat_if_list = implode(" ", $nat_if_list); $binat_if_list = "{ {$binat_if_list} }"; $reflection_txt .= "rdr on {$binat_if_list} from {$dstaddr} to {$target}{$sn1} -> {$srcaddr} bitmask\n"; } $nat_if_list = array_merge(array($natif), $nat_if_list); $reflection_txt .= filter_generate_reflection_nat($rule, $route_table, $nat_if_list, "", $srcaddr, $srcip, $sn); } } /* Add binat rules for Network Prefix translation */ if(is_array($config['nat']['npt'])) { foreach ($config['nat']['npt'] as $rule) { if (isset($rule['disabled'])) continue; if (!$rule['interface']) $natif = "wan"; else $natif = $rule['interface']; if (!isset($FilterIflist[$natif])) continue; $srcaddr = filter_generate_address($rule, 'source'); $dstaddr = filter_generate_address($rule, 'destination'); $srcaddr = trim($srcaddr); $dstaddr = trim($dstaddr); $natif = $FilterIflist[$natif]['descr']; $natrules .= "binat on \${$natif} from {$srcaddr} to any -> {$dstaddr}\n"; $natrules .= "binat on \${$natif} from any to {$dstaddr} -> {$srcaddr}\n"; } } /* ipsec nat */ if (is_array($config['ipsec']) && isset($config['ipsec']['enable'])) { if (is_array($config['ipsec']['phase2'])) { foreach ($config['ipsec']['phase2'] as $ph2ent) { if ($ph2ent['mode'] != 'transport' && !empty($ph2ent['natlocalid'])) { if (!function_exists('ipsec_idinfo_to_cidr')) require_once("ipsec.inc"); if (!is_array($ph2ent['localid'])) $ph2ent['localid'] = array(); $ph2ent['localid']['mode'] = $ph2ent['mode']; $local_subnet = ipsec_idinfo_to_cidr($ph2ent['localid']); if (empty($local_subnet) || $local_subnet == "0.0.0.0/0") continue; if (!is_subnet($local_subnet) && !is_ipaddr($local_subnet)) continue; if (!is_array($ph2ent['natlocalid'])) $ph2ent['natlocalid'] = array(); $ph2ent['natlocalid']['mode'] = $ph2ent['mode']; $natlocal_subnet = ipsec_idinfo_to_cidr($ph2ent['natlocalid']); if (empty($natlocal_subnet) || $natlocal_subnet == "0.0.0.0/0") continue; if (!is_subnet($natlocal_subnet) && !is_ipaddr($natlocal_subnet)) continue; if (!is_array($ph2ent['remoteid'])) $ph2ent['remoteid'] = array(); $ph2ent['remoteid']['mode'] = $ph2ent['mode']; $remote_subnet = ipsec_idinfo_to_cidr($ph2ent['remoteid']); if (empty($remote_subnet)) continue; if (!is_subnet($remote_subnet) && !is_ipaddr($remote_subnet)) continue; if ($remote_subnet == "0.0.0.0/0") $remote_subnet = "any"; if (is_ipaddr($natlocal_subnet) && !is_ipaddr($local_subnet) ) $nattype = "nat"; else $nattype = "binat"; $natrules .= "{$nattype} on enc0 from {$local_subnet} to {$remote_subnet} -> {$natlocal_subnet}\n"; } } } } $natrules .= "\n# Outbound NAT rules\n"; /* outbound rules - advanced or standard */ if(isset($config['nat']['advancedoutbound']['enable'])) { /* advanced outbound rules */ if(is_array($config['nat']['advancedoutbound']['rule'])) { foreach ($config['nat']['advancedoutbound']['rule'] as $obent) { update_filter_reload_status(sprintf(gettext("Creating advanced outbound rule %s"), $obent['descr'])); $src = alias_expand($obent['source']['network']); if(!$src) $src = $obent['source']['network']; $dst = alias_expand($obent['destination']['address']); if(!$dst) $dst = $obent['destination']['address']; if(isset($obent['destination']['not']) && !isset($obent['destination']['any'])) $dst = "!" . $dst; if(!$obent['interface'] || !isset($FilterIflist[$obent['interface']])) continue; $obtarget = ($obent['target'] == "other-subnet") ? $obent['targetip'] . '/' . $obent['targetip_subnet']: $obent['target']; $poolopts = (is_subnet($obtarget) || is_alias($obtarget)) ? $obent['poolopts'] : ""; $natrules .= filter_nat_rules_generate_if($obent['interface'], $src, $obent['sourceport'], $dst, $obent['dstport'], $obtarget, $obent['natport'], isset($obent['nonat']), isset($obent['staticnatport']), $obent['protocol'], $poolopts ); } } } else { /* standard outbound rules (one for each interface) */ update_filter_reload_status(gettext("Creating outbound NAT rules")); $tonathosts = ""; $numberofnathosts = 0; foreach (get_staticroutes() as $route) { $netip = explode("/", $route['network']); if (isset($GatewaysList[$route['gateway']])) { $gateway =& $GatewaysList[$route['gateway']]; if(!interface_has_gateway($gateway['interface']) && is_private_ip($netip[0])) { $numberofnathosts++; $tonathosts .= "{$route['network']} "; } } } /* create outbound nat entries for all local networks */ foreach($FilterIflist as $ocname => $oc) { if(!interface_has_gateway($ocname)) { if(is_ipaddr($oc['alias-address'])) { $numberofnathosts++; $tonathosts .= "{$oc['alias-address']}/{$oc['alias-subnet']} "; } if($oc['sa']) { $tonathosts .= "{$oc['sa']}/{$oc['sn']} "; $numberofnathosts++; } } } /* PPTP subnet */ if(($config['pptpd']['mode'] == "server" ) && is_private_ip($config['pptpd']['remoteip'])) { if (isset($config['pptpd']['n_pptp_units']) && is_numeric($config['pptpd']['n_pptp_units'])) $pptp_subnets = ip_range_to_subnet_array($config['pptpd']['remoteip'], long2ip32(ip2long($config['pptpd']['remoteip'])+($config['pptpd']['n_pptp_units']-1))); else $pptp_subnets = ip_range_to_subnet_array($config['pptpd']['remoteip'], long2ip32(ip2long($config['pptpd']['remoteip']))); $numberofnathosts += count($pptp_subnets); $tonathosts .= implode(" ", $pptp_subnets) . " "; } /* PPPoE subnet */ if (is_array($FilterIflist['pppoe'])) { foreach ($FilterIflist['pppoe'] as $pppoe) { if(is_private_ip($pppoe['ip'])) { $numberofnathosts++; $tonathosts .= "{$pppoe['sa']}/{$pppoe['sn']} "; } } } /* L2TP subnet */ if(isset($FilterIflist['l2tp']) && $FilterIflist['l2tp']['mode'] == "server") { $l2tp_subnet = $FilterIflist['l2tp']['sn']; if(is_private_ip($FilterIflist['l2tp']['sa']) && !empty($l2tp_subnet)) { $numberofnathosts++; $tonathosts .= "{$FilterIflist['l2tp']['sa']}/{$l2tp_subnet} "; } } /* add openvpn interfaces */ if(is_array($config['openvpn']['openvpn-server'])) { foreach ($config['openvpn']['openvpn-server'] as $ovpnsrv) { if (!empty($ovpnsrv['tunnel_network'])) { $numberofnathosts++; $tonathosts .= "{$ovpnsrv['tunnel_network']} "; } } } if(is_array($config['openvpn']['openvpn-client'])) { foreach ($config['openvpn']['openvpn-client'] as $ovpnsrv) { if (!empty($ovpnsrv['tunnel_network'])) { $numberofnathosts++; $tonathosts .= "{$ovpnsrv['tunnel_network']} "; } } } /* IPsec mode_cfg subnet */ if (isset($config['ipsec']['client']['enable']) && !empty($config['ipsec']['client']['pool_address']) && !empty($config['ipsec']['client']['pool_netbits'])) { $tonathosts .= "{$config['ipsec']['client']['pool_address']}/{$config['ipsec']['client']['pool_netbits']} "; $numberofnathosts++; } $natrules .= "\n# Subnets to NAT \n"; $tonathosts .= "127.0.0.0/8 "; if($numberofnathosts > 4) { $natrules .= "table { {$tonathosts} }\n"; $macroortable = ""; } else if($numberofnathosts > 0) { $natrules .= "tonatsubnets = \"{ {$tonathosts} }\"\n"; $macroortable = "\$tonatsubnets"; } if($numberofnathosts > 0): foreach ($FilterIflist as $if => $ifcfg) { if (substr($ifcfg['if'], 0, 4) == "ovpn") continue; update_filter_reload_status(sprintf(gettext('Creating outbound rules %1$s - (%2$s)'), $if, $ifcfg['descr'])); if(interface_has_gateway($if)) { $target = $ifcfg['ip']; /* create outbound nat entries for all local networks */ $natrules .= filter_nat_rules_generate_if($if, "{$macroortable}", 500, "", 500, $target, 500, false); $natrules .= filter_nat_rules_generate_if($if, "{$macroortable}", null, "", null, $target, null, isset($ifcfg['nonat'])); $natrules .= "\n"; } } endif; } /* load balancer anchor */ $natrules .= "\n# Load balancing anchor\n"; $natrules .= "rdr-anchor \"relayd/*\"\n"; update_filter_reload_status(gettext("Setting up TFTP helper")); $natrules .= "# TFTP proxy\n"; $natrules .= "rdr-anchor \"tftp-proxy/*\"\n"; if (!empty($config['system']['tftpinterface'])) { $tftpifs = explode(",", $config['system']['tftpinterface']); foreach($tftpifs as $tftpif) { if ($FilterIflist[$tftpif]) $natrules .= "rdr pass on {$FilterIflist[$tftpif]['if']} proto udp from any to any port tftp -> 127.0.0.1 port 6969\n"; } } /* DIAG: add ipv6 NAT, if requested */ if(isset($config['diag']['ipv6nat']['enable']) && is_ipaddr($config['diag']['ipv6nat']['ipaddr']) && is_array($FilterIflist['wan'])) { /* XXX: FIX ME! IPV6 */ $natrules .= "rdr on \${$FilterIflist['wan']['descr']} proto ipv6 from any to any -> {$config['diag']['ipv6nat']['ipaddr']}\n"; } if(file_exists("/var/etc/inetd.conf")) @unlink("/var/etc/inetd.conf"); // Open inetd.conf write handle $inetd_fd = fopen("/var/etc/inetd.conf","w"); /* add tftp protocol helper */ fwrite($inetd_fd, "tftp-proxy\tdgram\tudp\twait\t\troot\t/usr/libexec/tftp-proxy\ttftp-proxy -v\n"); if(isset($config['nat']['rule'])) { /* start reflection redirects on port 19000 of localhost */ $starting_localhost_port = 19000; $natrules .= "# NAT Inbound Redirects\n"; foreach ($config['nat']['rule'] as $rule) { update_filter_reload_status(sprintf(gettext("Creating NAT rule %s"), $rule['descr'])); if(isset($rule['disabled'])) continue; /* if item is an alias, expand */ $dstport = ""; $dstport[0] = alias_expand($rule['destination']['port']); if(!$dstport[0]) $dstport = explode("-", $rule['destination']['port']); /* if item is an alias, expand */ $localport = alias_expand($rule['local-port']); if(!$localport || $dstport[0] == $localport) { $localport = ""; } else if(is_alias($rule['local-port'])) { $localport = filter_expand_alias($rule['local-port']); if($localport) { $localport = explode(" ", trim($localport)); $localport = $localport[0]; $localport = " port {$localport}"; } } else if(is_alias($rule['destination']['port'])) { $localport = " port {$localport}"; } else { if(($dstport[1]) && ($dstport[0] != $dstport[1])) { $localendport = $localport + ($dstport[1] - $dstport[0]); $localport .= ":$localendport"; } $localport = " port {$localport}"; } switch(strtolower($rule['protocol'])) { case "tcp/udp": $protocol = "{ tcp udp }"; break; case "tcp": case "udp": $protocol = strtolower($rule['protocol']); break; default: $protocol = strtolower($rule['protocol']); $localport = ""; break; } $target = alias_expand($rule['target']); if(!$target && !isset($rule['nordr'])) { $natrules .= "# Unresolvable alias {$rule['target']}\n"; continue; /* unresolvable alias */ } if(is_alias($rule['target'])) $target_ip = filter_expand_alias($rule['target']); else if(is_ipaddr($rule['target'])) $target_ip = $rule['target']; else if(is_ipaddr($FilterIflist[$rule['target']]['ip'])) $target_ip = $FilterIflist[$rule['target']]['ip']; else $target_ip = $rule['target']; $target_ip = trim($target_ip); if($rule['associated-rule-id'] == "pass") $rdrpass = "pass "; else $rdrpass = ""; if (isset($rule['nordr'])) { $nordr = "no "; $rdrpass = ""; } else $nordr = ""; if(!$rule['interface']) $natif = "wan"; else $natif = $rule['interface']; if (!isset($FilterIflist[$natif])) continue; $srcaddr = filter_generate_address($rule, 'source', true); $dstaddr = filter_generate_address($rule, 'destination', true); $srcaddr = trim($srcaddr); $dstaddr = trim($dstaddr); if(!$dstaddr) $dstaddr = $FilterIflist[$natif]['ip']; $dstaddr_port = explode(" ", $dstaddr); if(empty($dstaddr_port[0]) || strtolower(trim($dstaddr_port[0])) == "port") continue; // Skip port forward if no destination address found $dstaddr_reflect = $dstaddr; if(isset($rule['destination']['any'])) { /* With reflection enabled, destination of 'any' has side effects * that most people would not expect, so change it on reflection rules. */ $dstaddr_reflect = $FilterIflist[$natif]['ip']; if(!empty($FilterIflist[$natif]['sn'])) $dstaddr_reflect = gen_subnet($dstaddr_reflect, $FilterIflist[$natif]['sn']) . '/' . $FilterIflist[$natif]['sn']; if($dstaddr_port[2]) $dstaddr_reflect .= " port " . $dstaddr_port[2]; } $natif = $FilterIflist[$natif]['if']; $reflection_type = "none"; if($rule['natreflection'] != "disable" && $dstaddr_port[0] != "0.0.0.0") { if($rule['natreflection'] == "enable") $reflection_type = "proxy"; else if($rule['natreflection'] == "purenat") $reflection_type = "purenat"; else if(!isset($config['system']['disablenatreflection'])) { if(isset($config['system']['enablenatreflectionpurenat'])) $reflection_type = "purenat"; else $reflection_type = "proxy"; } } if($reflection_type != "none") $nat_if_list = filter_get_reflection_interfaces($natif); else $nat_if_list = array(); if(empty($nat_if_list)) $reflection_type = "none"; $localport_nat = $localport; if(empty($localport_nat) && $dstaddr_port[2]) $localport_nat = " port " . $dstaddr_port[2]; if($srcaddr <> "" && $dstaddr <> "" && $natif) { $natrules .= "{$nordr}rdr {$rdrpass}on {$natif} proto {$protocol} from {$srcaddr} to {$dstaddr}" . ($nordr == "" ? " -> {$target}{$localport}" : ""); /* Does this rule redirect back to a internal host? */ if(isset($rule['destination']['any']) && !isset($rule['nordr']) && !isset($config['system']['enablenatreflectionhelper']) && !interface_has_gateway($rule['interface'])) { $rule_interface_ip = find_interface_ip($natif); $rule_interface_subnet = find_interface_subnet($natif); if(!empty($rule_interface_ip) && !empty($rule_interface_subnet)) { $rule_subnet = gen_subnet($rule_interface_ip, $rule_interface_subnet); $natrules .= "\n"; $natrules .= "no nat on {$natif} proto tcp from ({$natif}) to {$rule_subnet}/{$rule_interface_subnet}\n"; $natrules .= "nat on {$natif} proto tcp from {$rule_subnet}/{$rule_interface_subnet} to {$target} port {$dstport[0]} -> ({$natif})\n"; } } if ($reflection_type != "none") { if($reflection_type == "proxy" && !isset($rule['nordr'])) { $natrules .= filter_generate_reflection_proxy($rule, $nordr, $nat_if_list, $srcaddr, $dstaddr, $starting_localhost_port, $reflection_rules); $nat_if_list = array($natif); foreach ($reflection_rules as $txtline) fwrite($inetd_fd, $txtline); } else if($reflection_type == "purenat" || isset($rule['nordr'])) { $rdr_if_list = implode(" ", $nat_if_list); if(count($nat_if_list) > 1) $rdr_if_list = "{ {$rdr_if_list} }"; $natrules .= "\n# Reflection redirect\n"; $natrules .= "{$nordr}rdr {$rdrpass}on {$rdr_if_list} proto {$protocol} from {$srcaddr} to {$dstaddr_reflect}" . ($nordr == "" ? " -> {$target}{$localport}" : ""); $nat_if_list = array_merge(array($natif), $nat_if_list); } } if(empty($nat_if_list)) $nat_if_list = array($natif); $natrules .= "\n"; if(!isset($rule['nordr'])) $natrules .= filter_generate_reflection_nat($rule, $route_table, $nat_if_list, $protocol, "{$target}{$localport_nat}", $target_ip); } } } fclose($inetd_fd); // Close file handle if (isset($config['pptpd']['mode']) && ($config['pptpd']['mode'] != "off")) { if ($config['pptpd']['mode'] == "redir") { $pptpdtarget = $config['pptpd']['redir']; $natrules .= "# PPTP\n"; $natrules .= "rdr on \${$FilterIflist['wan']['descr']} proto gre from any to any -> {$pptpdtarget}\n"; $natrules .= "rdr on \${$FilterIflist['wan']['descr']} proto tcp from any to any port 1723 -> {$pptpdtarget}\n"; } } $natrules .= discover_pkg_rules("nat"); $natrules .= "# UPnPd rdr anchor\n"; $natrules .= "rdr-anchor \"miniupnpd\"\n"; if(!empty($reflection_txt)) $natrules .= "\n# Reflection redirects and NAT for 1:1 mappings\n" . $reflection_txt; // Check if inetd is running, if not start it. If so, restart it gracefully. $helpers = isvalidproc("inetd"); if(file_exists("/var/etc/inetd.conf")) { if(!$helpers) mwexec("/usr/sbin/inetd -wW -R 0 -a 127.0.0.1 /var/etc/inetd.conf"); else sigkillbypid("/var/run/inetd.pid", "HUP"); } return $natrules; } function filter_generate_user_rule_arr($rule) { global $config; update_filter_reload_status(sprintf(gettext("Creating filter rule %s ..."), $rule['descr'])); $ret = array(); $line = filter_generate_user_rule($rule); $ret['rule'] = $line; $ret['interface'] = $rule['interface']; if($rule['descr'] != "" and $line != "") $ret['descr'] = "label \"" . fix_rule_label("USER_RULE: {$rule['descr']}") . "\""; else $ret['descr'] = "label \"USER_RULE\""; return $ret; } function filter_generate_port(& $rule, $target = "source", $isnat = false) { $src = ""; $rule['protocol'] = strtolower($rule['protocol']); if(in_array($rule['protocol'], array("tcp","udp","tcp/udp"))) { if($rule[$target]['port']) { $srcport = explode("-", $rule[$target]['port']); $srcporta = alias_expand($srcport[0]); if(!$srcporta) log_error(sprintf(gettext("filter_generate_port: %s is not a valid {$target} port."), $srcport[0])); else if((!$srcport[1]) || ($srcport[0] == $srcport[1])) { $src .= " port {$srcporta} "; } else if(($srcport[0] == 1) && ($srcport[1] == 65535)) { /* no need for a port statement here */ } else if ($isnat) { $src .= " port {$srcport[0]}:{$srcport[1]}"; } else { if(is_port($srcporta) && $srcport[1] == 65535) { $src .= " port >= {$srcporta} "; } else if($srcport[0] == 1) { $src .= " port <= {$srcport[1]} "; } else { $srcport[0]--; $srcport[1]++; $src .= " port {$srcport[0]} >< {$srcport[1]} "; } } } } return $src; } function filter_generate_address(& $rule, $target = "source", $isnat = false) { global $FilterIflist, $config; $src = ""; if(isset($rule[$target]['any'])) { $src = "any"; } else if($rule[$target]['network']) { if(strstr($rule[$target]['network'], "opt")) { $optmatch = ""; $matches = ""; if($rule['ipprotocol'] == "inet6") { if(preg_match("/opt([0-9]*)$/", $rule[$target]['network'], $optmatch)) { $opt_ip = $FilterIflist["opt{$optmatch[1]}"]['ipv6']; if(!is_ipaddrv6($opt_ip)) return ""; $src = $opt_ip . "/" . $FilterIflist["opt{$optmatch[1]}"]['snv6']; /* check for opt$NUMip here */ } else if(preg_match("/opt([0-9]*)ip/", $rule[$target]['network'], $matches)) { $src = $FilterIflist["opt{$matches[1]}"]['ipv6']; if(!is_ipaddrv6($src)) return ""; } if(isset($rule[$target]['not'])) $src = " !{$src}"; } else { if(preg_match("/opt([0-9]*)$/", $rule[$target]['network'], $optmatch)) { $opt_ip = $FilterIflist["opt{$optmatch[1]}"]['ip']; if(!is_ipaddrv4($opt_ip)) return ""; $src = $opt_ip . "/" . $FilterIflist["opt{$optmatch[1]}"]['sn']; /* check for opt$NUMip here */ } else if(preg_match("/opt([0-9]*)ip/", $rule[$target]['network'], $matches)) { $src = $FilterIflist["opt{$matches[1]}"]['ip']; if(!is_ipaddrv4($src)) return ""; } if(isset($rule[$target]['not'])) $src = " !{$src}"; } } else { if($rule['ipprotocol'] == "inet6") { switch ($rule[$target]['network']) { case 'wan': $wansa = $FilterIflist['wan']['sav6']; if (!is_ipaddrv6($wansa)) return ""; $wansn = $FilterIflist['wan']['snv6']; $src = "{$wansa}/{$wansn}"; break; case 'wanip': $src = $FilterIflist["wan"]['ipv6']; if (!is_ipaddrv6($src)) return ""; break; case 'lanip': $src = $FilterIflist["lan"]['ipv6']; if (!is_ipaddrv6($src)) return ""; break; case 'lan': $lansa = $FilterIflist['lan']['sav6']; if (!is_ipaddrv6($lansa)) return ""; $lansn = $FilterIflist['lan']['snv6']; $src = "{$lansa}/{$lansn}"; break; case 'pptp': $pptpsav6 = gen_subnetv6($FilterIflist['pptp']['sav6'], $FilterIflist['pptp']['snv6']); $pptpsnv6 = $FilterIflist['pptp']['snv6']; $src = "{$pptpsav6}/{$pptpsnv6}"; break; case 'pppoe': if (is_array($FilterIflist['pppoe'])) { $pppoesav6 = gen_subnetv6($FilterIflist['pppoe'][0]['ipv6'], $FilterIflist['pppoe'][0]['snv6']); $pppoesnv6 = $FilterIflist['pppoe'][0]['snv6']; $src = "{$pppoesav6}/{$pppoesnv6}"; } } if(isset($rule[$target]['not'])) $src = " !{$src}"; } else { switch ($rule[$target]['network']) { case 'wan': $wansa = $FilterIflist['wan']['sa']; if (!is_ipaddrv4($wansa)) return ""; $wansn = $FilterIflist['wan']['sn']; $src = "{$wansa}/{$wansn}"; break; case 'wanip': $src = $FilterIflist["wan"]['ip']; break; case 'lanip': $src = $FilterIflist["lan"]['ip']; break; case 'lan': $lansa = $FilterIflist['lan']['sa']; if (!is_ipaddrv4($lansa)) return ""; $lansn = $FilterIflist['lan']['sn']; $src = "{$lansa}/{$lansn}"; break; case 'pptp': if (isset($config['pptpd']['n_pptp_units']) && is_numeric($config['pptpd']['n_pptp_units'])) $pptp_subnets = ip_range_to_subnet_array($config['pptpd']['remoteip'], long2ip32(ip2long($config['pptpd']['remoteip'])+($config['pptpd']['n_pptp_units']-1))); else $pptp_subnets = ip_range_to_subnet_array($config['pptpd']['remoteip'], long2ip32(ip2long($config['pptpd']['remoteip']))); if (empty($pptp_subnets)) return ""; $src = "{ " . implode(" ", $pptp_subnets) . " }"; break; case 'pppoe': /* XXX: This needs to be fixed somehow! */ if (is_array($FilterIflist['pppoe'])) { $pppoesa = gen_subnet($FilterIflist['pppoe'][0]['ip'], $FilterIflist['pppoe'][0]['sn']); $pppoesn = $FilterIflist['pppoe'][0]['sn']; $src = "{$pppoesa}/{$pppoesn}"; } break; } if(isset($rule[$target]['not'])) $src = " !{$src}"; } } } else if($rule[$target]['address']) { $expsrc = alias_expand($rule[$target]['address']); if(isset($rule[$target]['not'])) $not = "!"; else $not = ""; $src = " {$not} {$expsrc}"; } $src .= filter_generate_port($rule, $target, $isnat); return $src; } function filter_generate_user_rule($rule) { global $config, $g, $FilterIflist, $GatewaysList; global $layer7_rules_list, $dummynet_name_list; if(isset($config['system']['developerspew'])) { $mt = microtime(); echo "filter_generate_user_rule() being called $mt\n"; } /* don't include disabled rules */ if(isset($rule['disabled'])) { return "# rule " . $rule['descr'] . " disabled \n"; } update_filter_reload_status("Creating filter rules {$rule['descr']} ..."); $pptpdcfg = $config['pptpd']; $int = ""; $aline = array(); /* Check to see if the interface is in our list */ if(isset($rule['floating'])) { if(isset($rule['interface']) && $rule['interface'] <> "") { $interfaces = explode(",", $rule['interface']); $ifliste = ""; foreach ($interfaces as $iface) { if(array_key_exists($iface, $FilterIflist)) $ifliste .= " " . $FilterIflist[$iface]['if'] . " "; } if($ifliste <> "") $aline['interface'] = " on { {$ifliste} } "; else $aline['interface'] = ""; } else $aline['interface'] = ""; } else if(!array_key_exists($rule['interface'], $FilterIflist)) { foreach($FilterIflist as $oc) $items .= $oc['descr'] . " "; return "# array key \"{$rule['interface']}\" does not exist for \"" . $rule['descr'] . "\" in array: {{$items}}"; } else if((array_key_exists($rule['interface'], $FilterIflist)) && (is_array($FilterIflist[$rule['interface']])) && (is_array($FilterIflist[$rule['interface']][0]))) { /* Currently this only case for this is the pppoe server. There should be an existing macro with this name. */ $aline['interface'] = " on \$" . $rule['interface'] . " "; } else $aline['interface'] = " on \$" . $FilterIflist[$rule['interface']]['descr'] . " "; $ifcfg = $FilterIflist[$rule['interface']]; if($pptpdcfg['mode'] != "server") { if(($rule['source']['network'] == "pptp") || ($rule['destination']['network'] == "pptp")) return "# source network or destination network == pptp on " . $rule['descr']; } switch($rule['ipprotocol']) { case "inet": $aline['ipprotocol'] = "inet"; break; case "inet6": $aline['ipprotocol'] = "inet6"; break; default: $aline['ipprotocol'] = ""; break; } /* check for unresolvable aliases */ if($rule['source']['address'] && !alias_expand($rule['source']['address'])) { $error_text = "Unresolvable source alias '{$rule['source']['address']}' for rule '{$rule['descr']}'"; file_notice("Filter_Reload", $error_text); return "# {$error_text}"; } if($rule['destination']['address'] && !alias_expand($rule['destination']['address'])) { $error_text = "Unresolvable destination alias '{$rule['destination']['address']}' for rule '{$rule['descr']}'"; file_notice("Filter_Reload", $error_text); return "# {$error_text}"; } update_filter_reload_status("Setting up pass/block rules"); $type = $rule['type']; if($type != "pass" && $type != "block" && $type != "reject" && $type != "match") { /* default (for older rules) is pass */ $type = "pass"; } if($type == "reject") { $aline['type'] = "block return "; } else $aline['type'] = $type . " "; if(isset($rule['floating']) && $rule['floating'] == "yes") { if($rule['direction'] != "any") $aline['direction'] = " " . $rule['direction'] . " "; } else { /* ensure the direction is in */ $aline['direction'] = " in "; } if(isset($rule['log'])) $aline['log'] = "log "; if(!isset($rule['floating']) || isset($rule['quick'])) $aline['quick'] = " quick "; /* set the gateway interface */ update_filter_reload_status(sprintf(gettext("Setting up pass/block rules %s"), $rule['descr'])); /* do not process reply-to for gateway'd rules */ if($rule['gateway'] == "" && $aline['direction'] <> "" && interface_has_gateway($rule['interface']) && !isset($config['system']['disablereplyto']) && !isset($rule['disablereplyto']) && $type != "match") { if ($rule['ipprotocol'] == "inet6") { $rg = get_interface_gateway_v6($rule['interface']); if (is_ipaddrv6($rg)) $aline['reply'] = "reply-to ( {$ifcfg['ifv6']} {$rg} ) "; else if ($rule['interface'] <> "pptp") log_error("Could not find IPv6 gateway for interface({$rule['interface']})."); } else { $rg = get_interface_gateway($rule['interface']); if (is_ipaddrv4($rg)) $aline['reply'] = "reply-to ( {$ifcfg['if']} {$rg} ) "; else if ($rule['interface'] <> "pptp") log_error(sprintf(gettext("Could not find IPv4 gateway for interface (%s)."), $rule['interface'])); } } /* if user has selected a custom gateway, lets work with it */ else if($rule['gateway'] <> "" && $type == "pass") { if (isset($GatewaysList[$rule['gateway']])) /* Add the load balanced gateways */ $aline['route'] = " \$GW{$rule['gateway']} "; else if (isset($config['system']['skip_rules_gw_down'])) return "# rule " . $rule['descr'] . " disabled because gateway " . $rule['gateway'] . " is down "; else log_error("The gateway: {$rule['gateway']} is invalid or unknown, not using it."); } if (isset($rule['protocol']) && !empty($rule['protocol'])) { if($rule['protocol'] == "tcp/udp") $aline['prot'] = " proto { tcp udp } "; elseif(($rule['protocol'] == "icmp") && ($rule['ipprotocol'] == "inet6")) $aline['prot'] = " proto ipv6-icmp "; elseif($rule['protocol'] == "icmp") $aline['prot'] = " proto icmp "; else $aline['prot'] = " proto {$rule['protocol']} "; } else { if($rule['source']['port'] <> "" || $rule['destination']['port'] <> "") $aline['prot'] = " proto tcp "; } update_filter_reload_status(sprintf(gettext("Creating rule %s"), $rule['descr'])); /* source address */ $src = trim(filter_generate_address($rule, "source")); if (empty($src) || ($src == "/")) { return "# at the break!"; } $aline['src'] = " from $src "; /* OS signatures */ if(($rule['protocol'] == "tcp") && ($rule['os'] <> "")) $aline['os'] = " os {$rule['os']} "; /* destination address */ $dst = trim(filter_generate_address($rule, "destination")); if (empty($dst) || ($dst == "/")) { return "# returning at dst $dst == \"/\""; } $aline['dst'] = "to $dst "; //Layer7 support $l7_present = false; $l7_structures = array(); if(isset($rule['l7container']) && $rule['l7container'] != "none") { $l7_present = true; $l7rule =& $layer7_rules_list[$rule['l7container']]; $l7_structures = $l7rule->get_unique_structures(); $aline['divert'] = "divert " . $l7rule->GetRPort() . " "; } if (($rule['protocol'] == "icmp") && $rule['icmptype'] && ($rule['ipprotocol'] == "inet")) $aline['icmp-type'] = "icmp-type {$rule['icmptype']} "; if (($rule['protocol'] == "icmp") && $rule['icmptype'] && ($rule['ipprotocol'] == "inet6")) $aline['icmp6-type'] = "icmp6-type {$rule['icmptype']} "; if (!empty($rule['tag'])) $aline['tag'] = " tag " .$rule['tag']. " "; if (!empty($rule['tagged'])) $aline['tagged'] = " tagged " .$rule['tagged'] . " "; if (!empty($rule['dscp'])) { switch (strtolower($rule['dscp'])) { case 'va': $aline['dscp'] = " dscp 44 "; break; case 'cs1': $aline['dscp'] = " dscp 8 "; break; case 'cs2': $aline['dscp'] = " dscp 16 "; break; case 'cs3': $aline['dscp'] = " dscp 24 "; break; case 'cs4': $aline['dscp'] = " dscp 32 "; break; case 'cs5': $aline['dscp'] = " dscp 40 "; break; case 'cs6': $aline['dscp'] = " dscp 48 "; break; case 'cs7': $aline['dscp'] = " dscp 56 "; break; default: $aline['dscp'] = " dscp " . preg_replace('/\s.*$/', '', $rule['dscp']) . " "; break; } } if (!empty($rule['vlanprio']) && ($rule['vlanprio'] != "none")) $aline['vlanprio'] = " ieee8021q-pcp " . $rule['vlanprio'] . " "; if (!empty($rule['vlanprioset']) && ($rule['vlanprioset'] != "none")) $aline['vlanprioset'] = " ieee8021q-setpcp " . $rule['vlanprioset'] . " "; if ($type == "pass") { if (isset($rule['allowopts'])) $aline['allowopts'] = " allow-opts "; } $aline['flags'] = ""; if ($rule['protocol'] == "tcp") { if (isset($rule['tcpflags_any'])) $aline['flags'] = "flags any "; else if (!empty($rule['tcpflags2'])) { $aline['flags'] = "flags "; if (!empty($rule['tcpflags1'])) { $flags1 = explode(",", $rule['tcpflags1']); foreach ($flags1 as $flag1) { // CWR flag needs special treatment if($flag1[0] == "c") $aline['flags'] .= "W"; else $aline['flags'] .= strtoupper($flag1[0]); } } $aline['flags'] .= "/"; if (!empty($rule['tcpflags2'])) { $flags2 = explode(",", $rule['tcpflags2']); foreach ($flags2 as $flag2) { // CWR flag needs special treatment if($flag2[0] == "c") $aline['flags'] .= "W"; else $aline['flags'] .= strtoupper($flag2[0]); } } $aline['flags'] .= " "; } else { $aline['flags'] = "flags S/SA "; } } if ($type == "pass") { /* * # keep state * works with TCP, UDP, and ICMP. * # modulate state * works only with TCP. pfSense will generate strong Initial Sequence Numbers (ISNs) * for packets matching this rule. * # synproxy state * proxies incoming TCP connections to help protect servers from spoofed TCP SYN floods. * This option includes the functionality of keep state and modulate state combined. * # none * do not use state mechanisms to keep track. this is only useful if your doing advanced * queueing in certain situations. please check the faq. */ $noadvoptions = false; if (isset($rule['statetype']) && $rule['statetype'] <> "") { switch($rule['statetype']) { case "none": $noadvoptions = true; $aline['flags'] .= " no state "; break; case "modulate state": case "synproxy state": if ($rule['protocol'] == "tcp") $aline['flags'] .= "{$rule['statetype']} "; break; case "sloppy state": $aline['flags'] .= "keep state "; $rule['sloppy'] = true; break; default: $aline['flags'] .= "{$rule['statetype']} "; break; } } else $aline['flags'] .= "keep state "; if ($noadvoptions == false || $l7_present) if ((isset($rule['source-track']) and $rule['source-track'] <> "") or (isset($rule['max']) and $rule['max'] <> "") or (isset($rule['max-src-nodes']) and $rule['max-src-nodes'] <> "") or (isset($rule['max-src-states']) and $rule['max-src-states'] <> "") or ((in_array($rule['protocol'], array("tcp","tcp/udp"))) and ((isset($rule['statetimeout']) and $rule['statetimeout'] <> "") or (isset($rule['max-src-conn']) and $rule['max-src-conn'] <> "") or (isset($rule['max-src-conn-rate']) and $rule['max-src-conn-rate'] <> "") or (isset($rule['max-src-conn-rates']) and $rule['max-src-conn-rates'] <> ""))) or isset($rule['sloppy']) or $l7_present) { $aline['flags'] .= "( "; if (isset($rule['sloppy'])) $aline['flags'] .= "sloppy "; if (isset($rule['source-track']) and $rule['source-track'] <> "") $aline['flags'] .= "source-track rule "; if (isset($rule['max']) and $rule['max'] <> "") $aline['flags'] .= "max " . $rule['max'] . " "; if (isset($rule['max-src-nodes']) and $rule['max-src-nodes'] <> "") $aline['flags'] .= "max-src-nodes " . $rule['max-src-nodes'] . " "; if ((in_array($rule['protocol'], array("tcp","tcp/udp"))) and isset($rule['max-src-conn']) and $rule['max-src-conn'] <> "") $aline['flags'] .= "max-src-conn " . $rule['max-src-conn'] . " "; if (isset($rule['max-src-states']) and $rule['max-src-states'] <> "") $aline['flags'] .= "max-src-states " . $rule['max-src-states'] . " "; if ((in_array($rule['protocol'], array("tcp","tcp/udp"))) and isset($rule['statetimeout']) and $rule['statetimeout'] <> "") $aline['flags'] .= "tcp.established " . $rule['statetimeout'] . " "; if ((in_array($rule['protocol'], array("tcp","tcp/udp"))) and isset($rule['max-src-conn-rate']) and $rule['max-src-conn-rate'] <> "" and isset($rule['max-src-conn-rates']) and $rule['max-src-conn-rates'] <> "") { $aline['flags'] .= "max-src-conn-rate " . $rule['max-src-conn-rate'] . " "; $aline['flags'] .= "/" . $rule['max-src-conn-rates'] . ", overload flush global "; } if(!empty($aline['divert'])) $aline['flags'] .= "max-packets 8 "; $aline['flags'] .= " ) "; } } if($rule['defaultqueue'] <> "") { $aline['queue'] = " queue (".$rule['defaultqueue']; if($rule['ackqueue'] <> "") $aline['queue'] .= ",".$rule['ackqueue']; $aline['queue'] .= ") "; } if($rule['dnpipe'] <> "") { if (!empty($dummynet_name_list[$rule['dnpipe']])) { if($dummynet_name_list[$rule['dnpipe']][0] == "?") { $aline['dnpipe'] = " dnqueue( "; $aline['dnpipe'] .= substr($dummynet_name_list[$rule['dnpipe']],1); if($rule['pdnpipe'] <> "") $aline['dnpipe'] .= ",".substr($dummynet_name_list[$rule['pdnpipe']], 1); } else { $aline['dnpipe'] = " dnpipe ( " . $dummynet_name_list[$rule['dnpipe']]; if($rule['pdnpipe'] <> "") $aline['dnpipe'] .= "," . $dummynet_name_list[$rule['pdnpipe']]; } $aline['dnpipe'] .= ") "; } } /* is a time based rule schedule attached? */ if(!empty($rule['sched']) && !empty($config['schedules'])) { $aline['schedlabel'] = ""; foreach ($config['schedules']['schedule'] as $sched) { if($sched['name'] == $rule['sched']) { if(!filter_get_time_based_rule_status($sched)) { if(!isset($config['system']['schedule_states'])) mwexec("/sbin/pfctl -y {$sched['schedlabel']}"); return "# schedule finished - {$rule['descr']}"; } else if($g['debug']) log_error("[TDR DEBUG] status true -- rule type '$type'"); $aline['schedlabel'] = " schedule \"{$sched['schedlabel']}\" "; break; } } } $line = ""; /* exception(s) to a user rules can go here. */ /* rules with a gateway or pool should create another rule for routing to vpns */ if((($aline['route'] <> "") && (trim($aline['type']) == "pass") && strstr($dst, "any")) && (!isset($config['system']['disablenegate']))) { /* negate VPN/PPTP/PPPoE/Static Route networks for load balancer/gateway rules */ $negate_networks = " to " . filter_generate_port($rule, "destination"); $line .= $aline['type'] . $aline['direction'] . $aline['log'] . $aline['quick'] . $aline['interface'] . $aline['ipprotocol'] . $aline['prot'] . $aline['src'] . $aline['os'] . $negate_networks . $aline['icmp-type'] . $aline['icmp6-type'] . $aline['tag'] . $aline['tagged'] . $aline['vlanprio'] . $aline['vlanprioset'] . $aline['dscp'] . $aline['allowopts'] . $aline['flags'] . $aline['queue'] . $aline['dnpipe'] . $aline['schedlabel'] . " label \"NEGATE_ROUTE: Negate policy routing for destination\"\n"; } /* piece together the actual user rule */ $line .= $aline['type'] . $aline['direction'] . $aline['log'] . $aline['quick'] . $aline['interface'] . $aline['reply'] . $aline['route'] . $aline['ipprotocol'] . $aline['prot'] . $aline['src'] . $aline['os'] . $aline['dst'] . $aline['divert'] . $aline['icmp-type'] . $aline['icmp6-type'] . $aline['tag'] . $aline['tagged'] . $aline['dscp'] . $aline['vlanprio'] . $aline['vlanprioset'] . $aline['allowopts'] . $aline['flags'] . $aline['queue'] . $aline['dnpipe'] . $aline['schedlabel']; unset($aline); return $line; } function filter_rules_generate() { global $config, $g, $FilterIflist, $time_based_rules, $GatewaysList; $fix_rule_label = 'fix_rule_label'; update_filter_reload_status(gettext("Creating default rules")); if(isset($config['system']['developerspew'])) { $mt = microtime(); echo "filter_rules_generate() being called $mt\n"; } $pptpdcfg = $config['pptpd']; $ipfrules = ""; $ipfrules .= discover_pkg_rules("pfearly"); /* relayd */ $ipfrules .= "anchor \"relayd/*\"\n"; /* OpenVPN user rules from radius */ $ipfrules .= "anchor \"openvpn/*\"\n"; /* IPSec user rules from radius */ $ipfrules .= "anchor \"ipsec/*\"\n"; # BEGIN OF firewall rules /* default block logging? */ if(!isset($config['syslog']['nologdefaultblock'])) $log = "log"; else $log = ""; if(!isset($config['system']['ipv6allow'])) { $ipfrules .= "# Block all IPv6\n"; $ipfrules .= "block in {$log} quick inet6 all label \"Block all IPv6\"\n"; $ipfrules .= "block out {$log} quick inet6 all label \"Block all IPv6\"\n"; } $ipfrules .= << to any label "Block snort2c hosts" block quick from any to label "Block snort2c hosts" EOD; $ipfrules .= filter_process_carp_rules($log); $ipfrules .= "\n# SSH lockout\n"; if(is_array($config['system']['ssh']) && !empty($config['system']['ssh']['port'])) { $ipfrules .= "block in log quick proto tcp from to (self) port "; $ipfrules .= $config['system']['ssh']['port']; $ipfrules .= " label \"sshlockout\"\n"; } else { if($config['system']['ssh']['port'] <> "") $sshport = $config['system']['ssh']['port']; else $sshport = 22; if($sshport) $ipfrules .= "block in log quick proto tcp from to (self) port {$sshport} label \"sshlockout\"\n"; } $ipfrules .= "\n# webConfigurator lockout\n"; if(!$config['system']['webgui']['port']) { if($config['system']['webgui']['protocol'] == "http") $webConfiguratorlockoutport = "80"; else $webConfiguratorlockoutport = "443"; } else { $webConfiguratorlockoutport = $config['system']['webgui']['port']; } if($webConfiguratorlockoutport) $ipfrules .= "block in log quick proto tcp from to (self) port {$webConfiguratorlockoutport} label \"webConfiguratorlockout\"\n"; /* * Support for allow limiting of TCP connections by establishment rate * Useful for protecting against sudden outburts, etc. */ $ipfrules .= "block in quick from to any label \"virusprot overload table\"\n"; /* if captive portal is enabled, ensure that access to this port * is allowed on a locked down interface */ if(is_array($config['captiveportal'])) { foreach ($config['captiveportal'] as $cpcfg) { if(!isset($cpcfg['enable'])) continue; $cpinterfaces = explode(",", $cpcfg['interface']); $cpiflist = array(); $cpiplist = array(); foreach ($cpinterfaces as $cpifgrp) { if(!isset($FilterIflist[$cpifgrp])) continue; $tmpif = get_real_interface($cpifgrp); if(!empty($tmpif)) { $cpiflist[] = "{$tmpif}"; $cpipm = get_interface_ip($cpifgrp); if(is_ipaddr($cpipm)) { $carpif = link_ip_to_carp_interface($cpipm); if (!empty($carpif)) { $cpiflist[] = $carpif; $carpsif = explode(" ", $carpif); foreach ($carpsif as $cpcarp) { $carpip = find_interface_ip($cpcarp); if (is_ipaddr($carpip)) $cpiplist[] = $carpip; } } $cpiplist[] = $cpipm; } } } if (count($cpiplist) > 0 && count($cpiflist) > 0) { $cpinterface = implode(" ", $cpiflist); $cpaddresses = implode(" ", $cpiplist); $listenporthttps = $cpcfg['listenporthttps'] ? $cpcfg['listenporthttps'] : ($cpcfg['zoneid'] + 1); $listenporthttp = $cpcfg['listenporthttp'] ? $cpcfg['listenporthttp'] : $cpcfg['zoneid']; $portalias = $listenporthttps; $portalias .= " {$listenporthttp}"; $ipfrules .= "pass in quick on { {$cpinterface} } proto tcp from any to { {$cpaddresses} } port { {$portalias} } keep state(sloppy)\n"; $ipfrules .= "pass out quick on { {$cpinterface} } proto tcp from any to any flags any keep state(sloppy)\n"; } } } $bogontableinstalled = 0; foreach ($FilterIflist as $on => $oc) { /* block bogon networks */ /* http://www.cymru.com/Documents/bogon-bn-nonagg.txt */ /* file is automatically in cron every 3000 minutes */ if(!isset($config['syslog']['nologbogons'])) $bogonlog = "log"; else $bogonlog = ""; if(isset($config['interfaces'][$on]['blockbogons'])) { $ipfrules .= << to any label "{$fix_rule_label("block bogon IPv4 networks from {$oc['descr']}")}" EOD; } if(isset($config['system']['ipv6allow']) && ($oc['type6'] == "slaac" || $oc['type6'] == "dhcp6")) { $ipfrules .= << to any label "{$fix_rule_label("block bogon IPv6 networks from {$oc['descr']}")}" EOD; } $isbridged = false; if(is_array($config['bridges']['bridged'])) { foreach ($config['bridges']['bridged'] as $oc2) { if(stristr($oc2['members'], $on)) { $isbridged = true; break; } } } if($oc['ip'] && !($isbridged) && isset($oc['spoofcheck'])) $ipfrules .= filter_rules_spoofcheck_generate($on, $oc['if'], $oc['sa'], $oc['sn'], $log); /* block private networks ? */ if(!isset($config['syslog']['nologprivatenets'])) $privnetlog = "log"; else $privnetlog = ""; if(isset($config['interfaces'][$on]['blockpriv'])) { if($isbridged == false) { $ipfrules .= << "") { $ipfrules .= << $ifcfg) { if(isset($ifcfg['virtual'])) continue; $gw = get_interface_gateway($ifdescr); if (is_ipaddrv4($gw) && is_ipaddrv4($ifcfg['ip'])) { $ipfrules .= "pass out route-to ( {$ifcfg['if']} {$gw} ) from {$ifcfg['ip']} to !{$ifcfg['sa']}/{$ifcfg['sn']} keep state allow-opts label \"let out anything from firewall host itself\"\n"; if (is_array($ifcfg['vips'])) { foreach ($ifcfg['vips'] as $vip) if (ip_in_subnet($vip['ip'], "{$ifcfg['sa']}/{$ifcfg['sn']}")) $ipfrules .= "pass out route-to ( {$ifcfg['if']} {$gw} ) from {$vip['ip']} to !{$ifcfg['sa']}/{$ifcfg['sn']} keep state allow-opts label \"let out anything from firewall host itself\"\n"; else $ipfrules .= "pass out route-to ( {$ifcfg['if']} {$gw} ) from {$vip['ip']} to !" . gen_subnet($vip['ip'], $vip['sn']) . "/{$vip['sn']} keep state allow-opts label \"let out anything from firewall host itself\"\n"; } } $gwv6 = get_interface_gateway_v6($ifdescr); $stf = get_real_interface($ifdescr, "inet6"); $pdlen = 64 - calculate_ipv6_delegation_length($ifdescr); if (is_ipaddrv6($gwv6) && is_ipaddrv6($ifcfg['ipv6'])) { $ipfrules .= "pass out route-to ( {$stf} {$gwv6} ) inet6 from {$ifcfg['ipv6']} to !{$ifcfg['ipv6']}/{$pdlen} keep state allow-opts label \"let out anything from firewall host itself\"\n"; if (is_array($ifcfg['vips6'])) { foreach ($ifcfg['vips6'] as $vip) $ipfrules .= "pass out route-to ( {$stf} {$gwv6} ) inet6 from {$vip['ip']} to !{$vip['ip']}/{$pdlen} keep state allow-opts label \"let out anything from firewall host itself\"\n"; } } } /* add ipsec interfaces */ if(isset($config['ipsec']['enable']) || isset($config['ipsec']['client']['enable'])) $ipfrules .= "pass out on \$IPsec all keep state label \"IPsec internal host to host\"\n"; if(is_array($config['system']['webgui']) && !isset($config['system']['webgui']['noantilockout'])) { $alports = filter_get_antilockout_ports(); if(count($config['interfaces']) > 1 && !empty($FilterIflist['lan']['if'])) { /* if antilockout is enabled, LAN exists and has * an IP and subnet mask assigned */ $lanif = $FilterIflist['lan']['if']; $ipfrules .= << ScheduleMultipleTime main descr */ function filter_get_time_based_rule_status($schedule) { /* no schedule? rule should be installed */ if (empty($schedule)) return true; /* * iterate through time blocks and determine * if the rule should be installed or not. */ foreach($schedule['timerange'] as $timeday) { if (empty($timeday['month'])) $monthstatus = true; else $monthstatus = filter_tdr_month($timeday['month']); if (empty($timeday['day'])) $daystatus = true; else $daystatus = filter_tdr_day($timeday['day']); if (empty($timeday['hour'])) $hourstatus = true; else $hourstatus = filter_tdr_hour($timeday['hour']); if (empty($timeday['position'])) $positionstatus = true; else $positionstatus = filter_tdr_position($timeday['position']); if ($monthstatus == true && $daystatus == true && $positionstatus == true && $hourstatus == true) return true; } return false; } function filter_tdr_day($schedule) { global $g; if($g['debug']) log_error("[TDR DEBUG] filter_tdr_day($schedule)"); /* * Calculate day of month. * IE: 29th of may */ $date = date("d"); $defined_days = explode(",", $schedule); foreach($defined_days as $dd) { if ($date == $dd) return true; } return false; } function filter_tdr_hour($schedule) { global $g; /* $schedule should be a string such as 16:00-19:00 */ $tmp = explode("-", $schedule); $starting_time = strtotime($tmp[0]); $ending_time = strtotime($tmp[1]); $now = strtotime("now"); if($g['debug']) log_error("[TDR DEBUG] S: $starting_time E: $ending_time N: $now"); if($now >= $starting_time and $now <= $ending_time) return true; return false; } function filter_tdr_position($schedule) { global $g; /* * Calculate position, ie: day of week. * Sunday = 7, Monday = 1, Tuesday = 2 * Weds = 3, Thursday = 4, Friday = 5, * Saturday = 6 * ... */ $weekday = date("w"); if($g['debug']) log_error("[TDR DEBUG] filter_tdr_position($schedule) $weekday"); if($weekday == 0) $weekday = 7; $schedule_days = explode(",", $schedule); foreach($schedule_days as $day) { if($day == $weekday) return true; } return false; } function filter_tdr_month($schedule) { global $g; /* * Calculate month */ $todays_month = date("n"); $months = explode(",", $schedule); if($g['debug']) log_error("[TDR DEBUG] filter_tdr_month($schedule)"); foreach($months as $month) { if($month == $todays_month) return true; } return false; } function filter_setup_logging_interfaces() { global $config, $FilterIflist; if(isset($config['system']['developerspew'])) { $mt = microtime(); echo "filter_setup_logging_interfaces() being called $mt\n"; } $rules = ""; if (isset($FilterIflist['lan'])) $rules .= "set loginterface {$FilterIflist['lan']['if']}\n"; else if (isset($FilterIflist['wan'])) $rules .= "set loginterface {$FilterIflist['wan']['if']}\n"; return $rules; } function filter_process_carp_rules($log) { global $g, $config; if(isset($config['system']['developerspew'])) { $mt = microtime(); echo "filter_process_carp_rules($log) being called $mt\n"; } $lines = ""; /* return if there are no carp configured items */ if (!empty($config['hasync']) or !empty($config['virtualip']['vip'])) { $lines .= "block in $log quick proto carp from (self) to any\n"; $lines .= "pass quick proto carp\n"; } return $lines; } /* Generate IPSEC Filter Items */ function filter_generate_ipsec_rules() { global $config, $g, $FilterIflist; if(isset($config['system']['developerspew'])) { $mt = microtime(); echo "filter_generate_ipsec_rules() being called $mt\n"; } if (isset($config['system']['disablevpnrules'])) return "\n# VPN Rules not added disabled in System->Advanced.\n"; $ipfrules = "\n# VPN Rules\n"; /* Is IP Compression enabled? */ if(isset($config['ipsec']['ipcomp'])) exec("/sbin/sysctl net.inet.ipcomp.ipcomp_enable=1"); else exec("/sbin/sysctl net.inet.ipcomp.ipcomp_enable=0"); if(isset($config['ipsec']['enable']) && is_array($config['ipsec']['phase1'])) { /* step through all phase1 entries */ foreach ($config['ipsec']['phase1'] as $ph1ent) { if(isset ($ph1ent['disabled'])) continue; /* determine local and remote peer addresses */ if(!isset($ph1ent['mobile'])) { if (!function_exists('ipsec_get_phase1_dst')) require_once("ipsec.inc"); $rgip = ipsec_get_phase1_dst($ph1ent); if(!$rgip) { $ipfrules .= "# ERROR! Unable to determine remote IPsec peer address for {$ph1ent['remote-gateway']}\n"; continue; } } else $rgip = " any "; /* Determine best description */ if($ph1ent['descr']) $descr = $ph1ent['descr']; else $descr = $rgip; /* * Step through all phase2 entries and determine * which protocols are in use with this peer */ $prot_used_esp = false; $prot_used_ah = false; if(is_array($config['ipsec']['phase2'])) { foreach ($config['ipsec']['phase2'] as $ph2ent) { /* only evaluate ph2's bound to our ph1 */ if($ph2ent['ikeid'] != $ph1ent['ikeid']) continue; if($ph2ent['protocol'] == 'esp') $prot_used_esp = true; if($ph2ent['protocol'] == 'ah') $prot_used_ah = true; } } if(preg_match("/^[a-z0-9]+_vip/i", $ph1ent['interface'])) { $parentinterface = link_carp_interface_to_parent($ph1ent['interface']); } else { $parentinterface = $ph1ent['interface']; } if (empty($FilterIflist[$parentinterface]['descr'])) { $ipfrules .= "# Could not locate interface for IPsec: {$descr}\n"; continue; } unset($gateway); /* add endpoint routes to correct gateway on interface */ if((is_ipaddrv4($rgip)) && (interface_has_gateway($parentinterface))) { $gateway = get_interface_gateway($parentinterface); $interface = $FilterIflist[$parentinterface]['if']; $route_to = " route-to ( $interface $gateway ) "; $reply_to = " reply-to ( $interface $gateway ) "; } if((is_ipaddrv6($rgip)) && (interface_has_gatewayv6($parentinterface))) { $gateway = get_interface_gateway_v6($parentinterface); $interface = $FilterIflist[$parentinterface]['if']; $route_to = " route-to ( $interface $gateway ) "; $reply_to = " reply-to ( $interface $gateway ) "; } /* Just in case */ if((!is_ipaddr($gateway) || empty($interface))) { $route_to = " "; $reply_to = " "; } /* Add rules to allow IKE to pass */ $shorttunneldescr = substr($descr, 0, 35); $ipfrules .= << 0) { $errorrules = sprintf(gettext("There was an error while parsing the package filter rules for %s."), $pkg_inc) . "\n"; log_error($errorrules); file_put_contents("{$g['tmp_path']}/rules.packages.{$pkg}", "#{$errorrules}\n{$tmprules}\n"); continue; } $rules .= $tmprules; } } return $rules; } function filter_get_antilockout_ports($wantarray = false) { global $config; $lockoutports = array(); $guiport = ($config['system']['webgui']['protocol'] == "https") ? "443" : "80"; $guiport = empty($config['system']['webgui']['port']) ? $guiport : $config['system']['webgui']['port']; $lockoutports[] = $guiport; if (($config['system']['webgui']['protocol'] == "https") && !isset($config['system']['webgui']['disablehttpredirect']) && ($guiport != "80")) $lockoutports[] = "80"; if (isset($config['system']['enablesshd'])) $lockoutports[] = empty($config['system']['ssh']['port']) ? "22" : $config['system']['ssh']['port']; if ($wantarray) return $lockoutports; else return implode(" ", $lockoutports); } ?>