Help with FreeBSD Bridged Firewall

William Knechtel webmaster at
Wed Jul 30 10:54:51 PDT 2003

Yeah, the arp cache is the problem, thanks for nailing that one for me.
However, the ipfw rule you supplied doesn't seem to want to work for
me...  I think for the time being I'll just run a cron job every 15
minutes or so that clears the arp cache completely.  Thanks again for
your help!!  I really appreciate it!

Kindest Regards,

-----Original Message-----
From: Don Bowman [mailto:don at] 
Sent: Tuesday, July 29, 2003 7:33 PM
To: 'William Knechtel'; freebsd-net at
Subject: RE: Help with FreeBSD Bridged Firewall

> From: William Knechtel [mailto:webmaster at]

I think you need to allow arp through this device, something 
ipfw add 30 allow layer2 mac-type arp
[not sure which rule to insert it at].

I'm guessing your arp cache is timing out.

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