Date: Mon, 20 Dec 2010 12:17:59 -0800 From: David Brodbeck <gull@gull.us> To: Josh Suid <joshsuid@yahoo.com> Cc: freebsd-questions@freebsd.org Subject: Re: ssh interactive session, through intermediate hosts ... problems ... Message-ID: <AANLkTimHrsN0S934GBFfPhW12U=81FQFCECffb378g%2B6@mail.gmail.com> In-Reply-To: <894762.38692.qm@web114415.mail.gq1.yahoo.com> References: <894762.38692.qm@web114415.mail.gq1.yahoo.com>
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On Fri, Dec 3, 2010 at 4:43 PM, Josh Suid <joshsuid@yahoo.com> wrote: > First, where on the ssh client command line (see above) can I specify a m= ore > liberal timeout value ? =A0Since my interactive session has three or more= layers > of host between it, the whole thing falls apart if even one link slows do= wn a > bit... =A0how can I make my ssh sessions more tolerant to timeouts ? At what point are you seeing timeouts? I've found many home routers time out idle TCP sessions quite quickly, so if it's the first jump, you may find enabling ClientAliveInterval helps. I find a setting of 300 seconds (5 minutes) is frequent enough to keep most routers happy. > Second, how can I construct this session with just a single command ? =A0= When I > try this: > > ssh user@host ssh user@host2 ssh user@host3 > > I get this error: > > # ssh user@host ssh user@host2 > Pseudo-terminal will not be allocated because stdin is not a terminal. > Permission denied (publickey,keyboard-interactive). > > Is there a way to build this tunnel with a single command ? (an ssh comma= nd, > run over an ssh command, run over an ssh command) Normally when you execute a command over SSH it doesn't allocate a pseudo-tty, like it normally will for an interactive session. You might try passing the -t command to force allocation of a ptty. Another option would be to use ssh -L to create a tunnel from one host to another, then running ssh over that tunnel. This would also work with scp. You may run into problems with host keys, though.
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