diff options
Diffstat (limited to 'contrib/pf/authpf/authpf.8')
| -rw-r--r-- | contrib/pf/authpf/authpf.8 | 82 |
1 files changed, 61 insertions, 21 deletions
diff --git a/contrib/pf/authpf/authpf.8 b/contrib/pf/authpf/authpf.8 index b6977da..5d63e83 100644 --- a/contrib/pf/authpf/authpf.8 +++ b/contrib/pf/authpf/authpf.8 @@ -1,4 +1,4 @@ -.\" $OpenBSD: authpf.8,v 1.31 2003/12/10 04:10:37 beck Exp $ +.\" $OpenBSD: authpf.8,v 1.38 2005/01/04 09:57:04 jmc Exp $ .\" .\" Copyright (c) 2002 Bob Beck (beck@openbsd.org>. All rights reserved. .\" @@ -60,6 +60,10 @@ can add filter and translation rules using the syntax described in requires that the .Xr pf 4 system be enabled before use. +.Nm +can also maintain the list of IP address of connected users +in the "authpf_users" +.Pa table . .Pp .Nm is meant to be used with users who can connect via @@ -93,11 +97,16 @@ in order to cause evaluation of any .Nm rules: .Bd -literal -offset indent -nat-anchor authpf -rdr-anchor authpf -binat-anchor authpf -anchor authpf +nat-anchor "authpf/*" +rdr-anchor "authpf/*" +binat-anchor "authpf/*" +anchor "authpf/*" .Ed +.Pp +The "/*" at the end of the anchor name is required for +.Xr pf 4 +to process the rulesets attached to the anchor by +.Nm authpf . .Sh FILTER AND TRANSLATION RULES Filter and translation rules for .Nm @@ -113,10 +122,14 @@ Additionally, the macro .Em user_id is assigned the user name. .Pp -Filter and nat rules will first be searched for in +Filter and translation rules are stored in a file called +.Pa authpf.rules . +This file will first be searched for in .Pa /etc/authpf/users/$USER/ and then in .Pa /etc/authpf/ . +Only one of these files will be used if both are present. +.Pp Per-user rules from the .Pa /etc/authpf/users/$USER/ directory are intended to be used when non-default rules @@ -124,21 +137,11 @@ are needed on an individual user basis. It is important to ensure that a user can not write or change these configuration files. .Pp -Filter and translation rules are loaded from the file -.Pa /etc/authpf/users/$USER/authpf.rules . -If this file does not exist the file -.Pa /etc/authpf/authpf.rules -is used. The .Pa authpf.rules file must exist in one of the above locations for .Nm to run. -.Pp -Translation rules are also loaded from this file. -The use of translation rules in an -.Pa authpf.rules -file is optional. .Sh CONFIGURATION Options are controlled by the .Pa /etc/authpf/authpf.conf @@ -154,6 +157,10 @@ Currently, the allowed values are as follows: Use the specified .Pa anchor name instead of "authpf". +.It table=name +Use the specified +.Pa table +name instead of "authpf_users". .El .Sh USER MESSAGES On successful invocation, @@ -218,9 +225,15 @@ it becomes unresponsive, or if arp or address spoofing is used to hijack the session. Note that TCP keepalives are not sufficient for this, since they are not secure. +Also note that +.Ar AllowTcpForwarding +should be disabled for +.Nm +users to prevent them from circumventing restrictions imposed by the +packet filter ruleset. .Pp .Nm -will remove statetable entries that were created during a user's +will remove state table entries that were created during a user's session. This ensures that there will be no unauthenticated traffic allowed to pass after the controlling @@ -391,15 +404,15 @@ Example # ssh and use us as a dns server. internal_if="fxp1" gateway_addr="10.0.1.1" -nat-anchor authpf -rdr-anchor authpf -binat-anchor authpf +nat-anchor "authpf/*" +rdr-anchor "authpf/*" +binat-anchor "authpf/*" block in on $internal_if from any to any pass in quick on $internal_if proto tcp from any to $gateway_addr \e port = ssh pass in quick on $internal_if proto udp from any to $gateway_addr \e port = domain -anchor authpf +anchor "authpf/*" .Ed .Pp .Sy For a switched, wired net @@ -465,6 +478,33 @@ Oct 31 19:42:30.296553 rule 0.bbeck(20267).1/0(match): pass out on fxp1: \e 129.128.11.10.60539 > 198.137.240.92.22: S 2131494121:2131494121(0) win \e 16384 <mss 1460,nop,nop,sackOK> (DF) .Ed +.Pp +.Sy Using the authpf_users table +\- Simple +.Nm +settings can be implemented without an anchor by just using the "authpf_users" +.Pa table . +For example, the following +.Xr pf.conf 5 +lines will give SMTP and IMAP access to logged in users: +.Bd -literal +table <authpf_users> persist +pass in on $ext_if proto tcp from <authpf_users> \e + to port { smtp imap } keep state +.Ed +.Pp +It is also possible to use the "authpf_users" +.Pa table +in combination with anchors. +For example, +.Xr pf 4 +processing can be sped up by looking up the anchor +only for packets coming from logged in users: +.Bd -literal +table <authpf_users> persist +anchor "authpf/*" from <authpf_users> +rdr-anchor "authpf/*" from <authpf_users> +.Ed .Sh FILES .Bl -tag -width "/etc/authpf/authpf.conf" -compact .It Pa /etc/authpf/authpf.conf |
