Big problems with PF on freeBSD 6.2

Erik Norgaard norgaard at
Sun Feb 11 12:57:16 UTC 2007

Tim T Bos wrote:
> Hi Erik,
> I used a GENERIC kernel as well as a custom kernel.
> Both have the same behavior.
> I even tried a default install without any extra boot options.
> ON FreeBSD 5.5 i didn't have this problem.
> I'm going to try to log all actions.
> I must do something seriously wrong.....

I think it is probably just a typo that you've got blind to.

I suggest you stick with the GENERIC kernel until you have things 
figured out, that way we all know what you're talking about. There 
should be no loading of pf related modules in your loader.conf, in 
rc.conf you should have:

# Packet Filter

You should not have any of the firewall_ options set, these applies to ipfw.

Then make a simple rule set:

# Default action (this rule will never match)
block log all
# Your pass rules goes here

# Catch up anything that falls through here:
block log quick all

The last rule is obviously not needed, but I like to have it just in 
case there is something I missed.


# tcpdump -n -e -ttt -i pflog0

To watch live what happens (make sure that pflog is up and running).

Cheers, Erik
Ph: +34.666334818                      web:
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