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Date:      Fri, 16 Jun 2000 22:48:02 +0100
From:      Brian Somers <brian@Awfulhak.org>
To:        Chris Dillon <cdillon@wolves.k12.mo.us>
Cc:        Mike Tancsa <mike@sentex.ca>, Ian Smith <smithi@nimnet.asn.au>, freebsd-security@FreeBSD.org, brian@hak.lan.awfulhak.org, luigi@FreeBSD.org
Subject:   Re: ipfw log entry 
Message-ID:  <200006162148.WAA02840@hak.lan.Awfulhak.org>
In-Reply-To: Message from Chris Dillon <cdillon@wolves.k12.mo.us>  of "Fri, 16 Jun 2000 16:16:08 CDT." <Pine.BSF.4.20.0006161609060.46720-100000@mail.wolves.k12.mo.us> 

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> On Fri, 16 Jun 2000, Mike Tancsa wrote:
> 
> > At 05:14 AM 6/17/00 +1000, Ian Smith wrote:
> > >As I mentioned to John, this host is res6.geocities.com.  We see these
> > >here usually in big batches, perhaps about once a month on average, eg: 
> > >
> > >May 22 18:14:39 gaia /kernel:
> > > ipfw: 65000 Count TCP 209.1.224.16 203.41.52.xxx in via tun0 Fragment = 147
> > 
> > I thought I recognized that IP address...
> > 
> > ipfw: -1 Refuse TCP 209.1.224.16 206.130.91.146 in via fxp2 Fragment = 147
> > ipfw: -1 Refuse TCP 209.1.224.16 206.130.91.146 in via fxp2 Fragment = 147
> > 
> > Sheesh! We lots of this in our logs as well.
> 
> Ditto.  I get these quite often.
> 
> ipfw: -1 Refuse TCP 209.1.224.16 207.160.214.253 in via fxp7 Fragment = 147
> ipfw: -1 Refuse TCP 209.1.224.16 207.160.214.253 in via fxp7 Fragment = 147
> ipfw: -1 Refuse TCP 209.1.224.16 207.160.214.253 in via fxp7 Fragment = 147
> 
> Anyone figured out what/who this is yet?

It's a problem in the firewall code - I think because of assumptions 
about minimum lengths of packets.  I didn't figure this out, but I 
talked to luigi@ about it a couple of weeks ago.

> -- Chris Dillon - cdillon@wolves.k12.mo.us - cdillon@inter-linc.net
>    FreeBSD: The fastest and most stable server OS on the planet.
>    For Intel x86 and Alpha architectures. ( http://www.freebsd.org )

-- 
Brian <brian@Awfulhak.org>                        <brian@[uk.]FreeBSD.org>
      <http://www.Awfulhak.org>;                   <brian@[uk.]OpenBSD.org>
Don't _EVER_ lose your sense of humour !




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