DHCP client and PF rules

RW list-freebsd-2004 at morbius.sent.com
Thu Apr 20 17:03:53 UTC 2006

My desktop PC get its IP address from a PPPoA modem connected with ethernet. I 
started logging DHCP in PF, to make sure I wasn't dropping anything, but the 
*only* packets  I'm seeing are incoming broadcast:

    pass in on vr0: > BOOTP/DHCP, Reply, 
    length: 548

I presume that the DHCP client is bypassing the firewall, but I'm wondering 
about these incoming  broadcast packets - whether they have already been seen 
(and can be dropped) or not. The sessions are renewing without any specific 
DHCP rules.

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