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Date:      Mon, 10 Aug 1998 21:54:26 -0400 (EDT)
From:      Takkala <takkala@netwave.ca>
To:        freebsd-stable@FreeBSD.ORG
Subject:   more ipfw stuff (problems?)
Message-ID:  <Pine.BSF.3.96.980810215154.363A-100000@infid.detour.net>

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	While were on the topic of ipfw problems, here's another one. I'm
not sure if its a bug in ipfw or not, but here goes. 
	I got this in my logs a few days ago:  

Aug 7 19:35:09 ns1 /kernel: ipfw: -1 Refuse TCP 207.179.186.25:1341
160.79.218.4:80 in via ed1 
Aug 7 19:35:14 ns1 /kernel: ipfw: -1 Refuse TCP 207.179.186.25:2592
160.79.218.4:80 in via ed1

Now, I do not have any TCP deny rules on my server, the only rules i have
are to deny icmp echo request / reply packets. Also, after examining the
web server logs, I was able to determine that the above person was in fact
able to access documents on our web server. I just find the "ipfw: -1"
odd, and the fact that these packets are being refused. Does anyone know
if this is a bug in ipfw, or if the client was running something like
Windows, and was spewing bad TCP packets? I'm running 2.2.7-STABLE,
cvsupped somewhere around July 27. This is a very isolated incident,
considering that we serve around 60,000 ppl a day, and 83 million TCP
packets on average pass through this system a day.

Jari Takkala - [takkalaNOSPAM@netwave.ca]
[Hint: take out the NOSPAM when replying]


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