I just came across some info that this may be a problem with the DHCP
client in FreeBSD/m0n0wall...
> Comcast is in the process of taking over my broadband service from
> Insight Communications.
> Since switching to a Comcast address range, I have been having
> frequent problems with my Internet connection. In the log (the SW
> error should be irrelavent--they are trying to put motorala firmware
> in my Linksys modem) below is a typical sequence that repeats over and
> over while connected via m0n0wall...then, at 15:32, I connected a
> sacrificial XP machine directly to the cable modem at which point the
> modem properly synched up immediately. On the XP machine, the network
> interface had the following values:
> IP 68.x.y.z
> subnet 255.255.252.0
> Gateway 68.x.a.b (within same subnet as IP)
> DHCP 172.30.58.34
> DNS 68.57.q.r
> I am guessing that the IP address of the DHCP server is giving me
> trouble. Any ideas? What else do I need to provide to complete this
> picture? (There is no route to 172.x.x.x in m0n0wall routing table.)
> Same issues using a Linksys BEFCMU10 modem and a Motorala SB5100 modem.
> One more question: Is there a way to force m0n0wall to release and
> renew DHCP on the WAN interface?
> Thank you for any help.