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Date:      Fri, 10 May 1996 15:43:50 +1000 (EST)
From:      Richard J Uren <richard@thehub.com.au>
To:        Joe McGuckin <joe@ns.via.net>
Cc:        questions@freebsd.org
Subject:   Re: Strange TCP/Telnet behavoir
Message-ID:  <Pine.BSF.3.91.960510153646.938A-100000@smople.thehub.com.au>
In-Reply-To: <199605092324.QAA00926@ns.via.net>

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On Thu, 9 May 1996, Joe McGuckin wrote:

> I have set up a firewall using FreeBSD 2.0.1 and fwtk.
> 
> When connecting to the firewall from either a 
> SCO or BSDI machine, I can connect and authenticate ok. When I say 
> "connect foobar", the telnet proxy hangs forever.
> 
> On the same ethernet are 2 SCO machines. One has an older version of SCO -
> that machine can get in ok. The newer version of SCO hangs.
> 
> Telnetting in from a Sun or FreeBSD machine works ok.
> 
> Any ideas?
> 
> Thanks,
> 
>   Joe
> 

Hey Joe,

We had a similar problem some time ago here - try disabling tcp 
extensions on the firewall machine.  Our problem wasn't with a firewall 
but with 2 FreeBSD boxes talking through an annex 4000 (terminal server).
The command is 
	sysctl -w net.inet.tcp.rfc1323=0
	sysctl -w net.inet.tcp.rfc1644=0

The older version of SCO might not support TCP extensions (wild guess).

Cheers
Richard



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