selective logging of what pf is rejecting?

Huzeyfe Onal huzeyfe.onal at gmail.com
Fri Sep 9 12:17:23 PDT 2005


hi,
you can use tcpdump to watch pf action, why it drop or accept packets.

try to use 
tcpdump -i pflog0 -e 

ps: pflogd must be running... also read
http://www.openbsd.com/faq/pf/logging.html

2005/9/9, bob self <bobself at charter.net>:
> 
> My pf.conf file looks something like this
> 
> block in all
> block out all
> pass quick on lo0 keep state
> antispoof for $ext_if
> 
> pass in on $ext_if from <goodguys> to any keep state
> pass in log on $ext_if proto tcp from any to $ext_if port 80 flags S/SA
> keep state label "www"        #apache
> block in on $ext_if from <badguys> to any
> 
> pass out on $ext_if proto tcp from any to any flags S/SA keep state    #
> allow any tcp setup out
> pass out on $ext_if proto udp all keep state                # allow any
> udp out
> 
> pass on $ext_if inet proto icmp all icmp-type 8 code 0 keep state    #
> allow echo request in or out, (man pf.conf:1618)
> 
> 
> Is there a way I can turn on (temporarily) logging of wht pf is not
> allowing to come in? Also, is there a real-time tool that
> will let you watch what pf if blocking from coming in?
> 
> How could you just log what pf allows to get through?
> 
> thanks,
> Bob Self
> 
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-- 
Huzeyfe ÖNAL  
---
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