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Diffstat (limited to 'contrib/ipfilter/rules/BASIC_1.FW')
| -rw-r--r-- | contrib/ipfilter/rules/BASIC_1.FW | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/contrib/ipfilter/rules/BASIC_1.FW b/contrib/ipfilter/rules/BASIC_1.FW deleted file mode 100644 index d2bd60a..0000000 --- a/contrib/ipfilter/rules/BASIC_1.FW +++ /dev/null @@ -1,99 +0,0 @@ -#!/sbin/ipf -f - -# -# SAMPLE: RESTRICTIVE FILTER RULES -# -# THIS EXAMPLE IS WRITTEN FOR IP FILTER 3.3 -# -# ppp0 - (external) PPP connection to ISP, address a.b.c.d/32 -# -# ed0 - (internal) network interface, address w.x.y.z/32 -# -# This file contains the basic rules needed to construct a firewall for the -# above situation. -# -#------------------------------------------------------- -# *Nasty* packets we don't want to allow near us at all! -# short packets which are packets fragmented too short to be real. -block in log quick all with short -#------------------------------------------------------- -# Group setup. -# ============ -# By default, block and log everything. This maybe too much logging -# (especially for ed0) and needs to be further refined. -# -block in log on ppp0 all head 100 -block in log proto tcp all flags S/SA head 101 group 100 -block out log on ppp0 all head 150 -block in log on ed0 from w.x.y.z/24 to any head 200 -block in log proto tcp all flags S/SA head 201 group 200 -block in log proto udp all head 202 group 200 -block out log on ed0 all head 250 -#------------------------------------------------------- -# Localhost packets. -# ================== -# packets going in/out of network interfaces that aren't on the loopback -# interface should *NOT* exist. -block in log quick from 127.0.0.0/8 to any group 100 -block in log quick from any to 127.0.0.0/8 group 100 -block in log quick from 127.0.0.0/8 to any group 200 -block in log quick from any to 127.0.0.0/8 group 200 -# And of course, make sure the loopback allows packets to traverse it. -pass in quick on lo0 all -pass out quick on lo0 all -#------------------------------------------------------- -# Invalid Internet packets. -# ========================= -# -# Deny reserved addresses. -# -block in log quick from 10.0.0.0/8 to any group 100 -block in log quick from 192.168.0.0/16 to any group 100 -block in log quick from 172.16.0.0/12 to any group 100 -# -# Prevent IP spoofing. -# -block in log quick from a.b.c.d/24 to any group 100 -# -#------------------------------------------------------- -# Allow outgoing DNS requests (no named on firewall) -# -pass in quick proto udp from any to any port = 53 keep state group 202 -# -# If we were running named on the firewall and all internal hosts talked to -# it, we'd use the following: -# -#pass in quick proto udp from any to w.x.y.z/32 port = 53 keep state group 202 -#pass out quick on ppp0 proto udp from a.b.c.d/32 to any port = 53 keep state -# -# Allow outgoing FTP from any internal host to any external FTP server. -# -pass in quick proto tcp from any to any port = ftp keep state group 201 -pass in quick proto tcp from any to any port = ftp-data keep state group 201 -pass in quick proto tcp from any port = ftp-data to any port > 1023 keep state group 101 -# -# Allow NTP from any internal host to any external NTP server. -# -pass in quick proto udp from any to any port = ntp keep state group 202 -# -# Allow outgoing connections: SSH, TELNET, WWW -# -pass in quick proto tcp from any to any port = 22 keep state group 201 -pass in quick proto tcp from any to any port = telnet keep state group 201 -pass in quick proto tcp from any to any port = www keep state group 201 -# -#------------------------------------------------------- -block in log proto tcp from any to a.b.c.d/32 flags S/SA head 110 group 100 -# -# Allow incoming to the external firewall interface: mail, WWW, DNS -# -pass in log quick proto tcp from any to any port = smtp keep state group 110 -pass in log quick proto tcp from any to any port = www keep state group 110 -pass in log quick proto tcp from any to any port = 53 keep state group 110 -pass in log quick proto udp from any to any port = 53 keep state group 100 -#------------------------------------------------------- -# Log these: -# ========== -# * return RST packets for invalid SYN packets to help the other end close -block return-rst in log proto tcp from any to any flags S/SA group 100 -# * return ICMP error packets for invalid UDP packets -block return-icmp(net-unr) in proto udp all group 100 |
