*BSD News Article 95154


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From: "Clement Cheung" <clement@ans.com.au>
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: FreeBSD vs Annex - problem with TCP sessions
Date: 12 May 1997 08:17:33 GMT
Organization: ANS Communications P/L
Lines: 66
Message-ID: <01bc5eac$e93546e0$16143ccb@clementc.ans.com.au>
References: <5kmp6g$mbs$1@tiger.jet.msk.su> <5kn8hd$76g@raptor.mtc.ti.com> <5l6hae$nab$1@tiger.jet.msk.su>
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Hi Max,

I just brought the FreeBSD v2.2.1 up and have some trouble with my Annex
4000.  I cannot finger the Annex from the FreeBSD v2.2.1.  Finger works
fine in a FreeBSD 2.1.7 and BSDI.  Is this something that you experienced?

Also can you give details of how you fix the problem?  We have the FreeBSD
2.2.1 and the Annex on the same Ethernet cable.  Does your configuration be
the same?  Or are you connecting to the Annex through a serial/modem
connections?

Your help is much appreciated.

Regards
Clement 

Max Klochkov <mk@jet.msk.su> wrote in article
<5l6hae$nab$1@tiger.jet.msk.su>...
> 7 May 1997 14:45:58 GMT Brian Somers (brian@shift.utell.net) wrote:
> > In article <336FD0E4.2195@onthenet.com.au>,
> > 	Tony Griffiths <tonyg@OntheNet.com.au> writes:
> > > Rex Fowler wrote:
> > >> 
> > >> 
> > >> Have you tried changing /etc/sysconfig to the following?
> > >> 
> > >> #
> > >> # Some broken implementations can't handle the RFC 1323 and RFC 1644
> > >> # TCP options.  If TCP connections randomly hang, try disabling
this,
> > >> # and bug the vendor of the losing equipment.
> > >> #
> > >> tcp_extensions=NO
> > >> 
> > > Also, you migh want to try disabling VJ compression.  We had an
> > > interesting situation here the other day (Friday) where a FreeBSD box
> > > could dial in to our Annex T/S but could NOT talk TCP to ANY local
> > > FreeBSD box, but COULD talk to Solaris and Digital Unix boxes.  UDP
> > > worked (at least ping worked).  In desperation, we put a '-vj' in the
> > > options file, bounced the link and then it all worked fine!
> > > 
> > > The symptions of the problem were 'hung' TCP connections that were
> > > sometimes ESTABLISHED but other times in SYN_WAIT.
> > > 
> > > Apparently, there is a "bug" in the VJ compression code that is still
> > > there in 2.2.1 .  A friend of mine has supposedly fixed the code but
is
> > > still to feed the changes back to the developers.  I'll twist his arm
a
> > > little more!!!
> > 
> > If you can twist a little harder, I'll incorporate the changes.
> > 
> > > Tony
> > 
> > -- 
> > Brian <brian@awfulhak.org> <brian@freebsd.org>
> >       <http://www.awfulhak.org>
> > Don't _EVER_ lose your sense of humour !
> 
>   The problem was completely solved after using kernel PPP (pppd) with
> VJ compression turned off.
> 
> -- 
> Maxim Klochkov
>