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Date:      Mon, 15 Oct 2001 10:43:12 -0400
From:      Jim Conner <jconner@enterit.com>
To:        cjclark@alum.mit.edu
Cc:        Kris Kennaway <kris@obsecurity.org>, freebsd-questions@FreeBSD.ORG
Subject:   Re: SSH - anyone else had this problem?
Message-ID:  <5.1.0.14.0.20011015104217.02fd8d10@mail.enterit.com>
In-Reply-To: <20011014000939.A321@blossom.cjclark.org>
References:  <5.1.0.14.0.20011014012951.02b85028@mail.enterit.com> <5.1.0.14.0.20011013131959.02d81150@mail.enterit.com> <5.1.0.14.0.20011013131959.02d81150@mail.enterit.com> <20011013145844.B74148@xor.obsecurity.org> <5.1.0.14.0.20011014012951.02b85028@mail.enterit.com>

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At 00:09 10.14.2001 -0700, Crist J. Clark wrote:
>On Sun, Oct 14, 2001 at 01:33:44AM -0400, Jim Conner wrote:
> > At 14:58 10.13.2001 -0700, Kris Kennaway wrote:
> > >On Sat, Oct 13, 2001 at 01:26:24PM -0400, Jim Conner wrote:
> > > > I just installed 4.3 Current very vanilla install including with
> > > > ssh.  Using SSH as my main way of remote administration I notcied after
> > > > about three days of the machine being up that after a client 
> authenticates
> > > > it takes nearly a minute for the shell to start.  I figured this 
> might be
> > > > because reverse lookups were not working properly.  When I ran a 
> verbose
> > > > client I noticed that reverse lookups occur just after the client 
> enters
> > > > his/her login name and cr's.  However, once a client inputs his/her 
> passwd
> > > > and cr's this is when the problem occurs.  So I don't think its 
> reverse ns
> > > > lookups.
> > >
> > >Yes, it probably is reverse DNS lookup.
> >
> > It's not reverse lookups.  I see in the logs that the reverse lookup is
> > working.  I watched during a verbose output of the client (and watching 
> the
> > log on the server side) when reverse lookup occurs.  I see that reverse
> > lookup occurs just after the client enters their username and presses
> > enter.  The problem I'm seeing occurs *after* the user puts his/her
> > password in *after* the lookup has already successfully occurred.  It is
> > something else.  Unless you can explain to me what other reverse lookup it
> > seems to be doing after it has already successfully looked up the ptr.
>
>It still may be lookup issuse from the DISPLAY name. Are you doing X11
>forwarding? What happens if you try it without X11 forwarding,
>
>   $ ssh -x -v -v remote-host
>
>And see if it still does it.


Christ,

This was exactly the problem.  Thank you.  I just turned forwarding off 
altogether since I don't use X on the box anyway.

Thanks  again.

>--
>Crist J. Clark                     |     cjclark@alum.mit.edu
>                                    |     cjclark@jhu.edu
>http://people.freebsd.org/~cjc/    |     cjc@freebsd.org



- Jim

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