Re: resuming dropped ssh connections

[Timur Irmatov <irmatov@gmail.com>]

On 8/13/05, Steve <dsec-nospam@braingia.org> wrote:
> On Fri, Aug 12, 2005 Shannon R. wrote:
> > i do most of my work thru a ssh connection to a remote
> > debian server. i've been having connection problems
> > lately though and would get disconnected almost every
> > hour or two.
> >
> > is it possible to resume dropped ssh connections as if
> > i was never disconnected? im using putty as ssh client
> > on a windows machine.
> 
> As others have pointed out, screen is your friend.  I'm more curious as
> to the cause of the disconnections though.  Have you traced the root
> cause?  Since you mentioned that you use PuTTY, did you have a look at
> the "Seconds between keepalives" option under 'Connection'?  I've
> noticed that this is all but required when connecting from some
> locations such as hotels.  See the PuTTY docs for important caveats on
> using this though:
> 
> http://the.earth.li/~sgtatham/putty/0.58/htmldoc/Chapter4.html#config-connection
> 
> Also, note that the TCPKeepAlive option (different than the keepalive
> already discussed for putty) defaults to yes which means that
> connections will (may) be killed if there's a network problem between
> you and the host.  ClientAliveInterval and ClientAliveCountMax are also
> important here, man sshd_config (5) for more information.

If the reason for disconnection is (relatively) short network outages,
this can be solved by altering TCPMaxDataRetransmissions (AFAIR) in
Windows registry..


-- 
Timur Irmatov, JID: thor@jabber.org.au.