pf binat problem
fbsd_user
fbsd_user at a1poweruser.com
Sat Feb 25 12:52:21 PST 2006
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-----Original Message-----
From: owner-freebsd-questions at freebsd.org
[mailto:owner-freebsd-questions at freebsd.org]On Behalf Of Leon Botes
Sent: Saturday, February 25, 2006 5:15 AM
To: freebsd-questions at freebsd.org
Subject: pf binat problem
# 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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