Date: Sat, 25 Feb 2006 12:14:51 +0200 From: Leon Botes <leon@trusc.net> To: freebsd-questions@freebsd.org Subject: pf binat problem Message-ID: <44002E1B.7040201@trusc.net>
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# network diagram
# __________
# | | <dsl1_if>---<dsl1_rt>
# | |
# <pri_net>---<pri_if>| freebsd | <dsl2_if>---<dsl2_rt>
# | pf |
# <dmz_srv>---<dmz_if>| firewall | <dig_if>----<dig_rt>
# | |
# (internal nets) |__________| (external nets)
Default Gateway is <dig_rt>.
When a connection arrives on one of the dsl_if's it is redirected to the
correct port on the dms_srv, traced via tcpdump.
The dmz_srv responds but tries to send its reply out the default gateway
instead of via the interface the connection arrived on.
The dmz server is actually a LVS cluster masqueraded.
All connections coming in via the dig_if get redirected and work fine.
How can i tell pf to return connections out the same interface they
arrived on and not use the default route out dig_if?
dsl1_if = "rl3"
dsl1_rt = "172.16.3.1"
dsl1_ip = "172.16.3.2"
dsl2_if = "rl1"
dsl2_rt = "172.16.4.1"
dsl2_ip = "172.16.4.2"
dmz_if = "rl0"
dmz_srv = "172.16.2.4"
dmz_if_ip = "172.16.2.3"
pri_if = "rl2"
pri_ip = "192.168.254.1"
binat on $dig_if from $dmz_srv to any -> $dig_ip
binat on $dsl1_if from $dmz_srv to any -> $dsl1_ip
binat on $dsl2_if from $dmz_srv to any -> $dsl2_ip
nat on $dig_if from <pri_net> to any -> $dig_ip
nat on $dsl1_if from <pri_net> to any -> $dsl1_ip
nat on $dsl2_if from <pri_net> to any -> $dsl2_ip
rdr on $dsl1_if inet proto tcp from any to $dsl1_ip port { 25, 80, 110 }
-> $dmz_srv
rdr on $dsl2_if inet proto tcp from any to $dsl2_ip port { 25, 80, 110 }
-> $dmz_srv
Thanks
Leon
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