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From: Darren Reed <avalon@coombs.anu.edu.au>
Subject: Re: kern/3244: ipfw flush closes connections
To: adam@veda.is (Adam David)
Date: Fri, 11 Apr 1997 08:56:59 +1000 (EST)
Cc: adrian@obiwan.aceonline.com.au, hackers@freebsd.org
In-Reply-To: <199704101528.PAA09496@veda.is> from "Adam David" at Apr 10, 97 03:28:06 pm
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In some mail from Adam David, sie said:
> 
> > I'm cvsupping the latest source as we speak :)
> > 
> > I'll look at it tomorrow morning, can anyone else verify this?
> > 
> > (I could take stabs but I won't).
> > 
> > -- 
> > Adrian Chadd			| UNIX, MS-DOS and Windows ...
> > <adrian@psinet.net.au>		| (also known as the Good, the bad and the
> > 				|				ugly..)
> 
> I have seen it most often with telnet/rlogin into the "victim" machine, and
> SMTP (and other TCP) connections going weird after 'sh /etc/rc.firewall'
> during normal operation.

guess: ipfw flush doesn't close any connections but the resulting state of
ipfw after the flush causes all connection info to be lost, resulting in
packets not being forwarded properly and the connection closed,.