Subject: pf: pass in quick to port 25 still getting some blocks

Len Conrad lconrad at
Fri Jul 2 21:25:41 UTC 2010

setting up pf on fbsd 7.2 for host security on a mail gateway.

the only rule for port 25 is:

pass in quick on em0 inet proto tcp from any to $ext_if port = smtp flags S/SA keep state

and then last rule:

block drop in log on em0 inet from any to $ext_if

while 1000s of connections to port 25 are getting through with the pass rule, several 100 connections are getting blocked with the default block rule, bypassing the pass rule.

I can't see how pf is selecting these connections to be blocked.


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