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Date: Mon, 6 Apr 2009 20:54:47 +0300
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From: Maxim Ignatenko <gelraen.ua@gmail.com>
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Subject: Re: [patch] matching IPv4 broadcast packets in ipfw
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Strange, but packet
    TCP 88.222.53.231:55882 192.168.100.2:44943 out via gif0
matched the rule
    allow log ip from any to any broadcast

ifconfig gif0
gif0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1280
        tunnel inet x.x.x.x --> x.x.x.x
        inet 192.168.100.1 --> 192.168.100.2 netmask 0xfffffffc

I thougth it should not be matched because gif0 has not set
IFF_BROADCAST in if_flags