From owner-freebsd-questions Thu May 9 22:48:52 1996 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id WAA09349 for questions-outgoing; Thu, 9 May 1996 22:48:52 -0700 (PDT) Received: from smople.thehub.com.au (smople.thehub.com.au [203.17.162.10]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id WAA09330 for ; Thu, 9 May 1996 22:48:47 -0700 (PDT) Received: (from richard@localhost) by smople.thehub.com.au (8.6.12/8.6.9) id PAA01471; Fri, 10 May 1996 15:43:50 +1000 Date: Fri, 10 May 1996 15:43:50 +1000 (EST) From: Richard J Uren To: Joe McGuckin cc: questions@freebsd.org Subject: Re: Strange TCP/Telnet behavoir In-Reply-To: <199605092324.QAA00926@ns.via.net> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk 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