[Gllug] ssh problem doing my head in

[John G Walker]

On Thu, 1 Feb 2007 22:29:47 +0000 Tom Schutzer-Weissmann
<tom at schutzer-weissmann.net> wrote:

> I cannot ssh from my linux box at one of the places I work. After 
> authentication the thing just hangs.
> 
> From what I can discover, the problem could be: the host I'm
> connecting to has a problem (but I've tried lots, and I can connect
> to them from elsewhere), DNS is badly configured (maybe), or a router
> en route can't handle tcp windowing correctly -
> http://kerneltrap.org/node/6723
> 
> I _can_ connect fine using putty on Windows. Does that mean I can
> assume that the DNS setup is ok? The other thing I checked is that a
> reverse lookup of the public IP address gave me a hostname that
> resolves to the same IP address. It does, is that enough to discount
> DNS?
> 
> So perhaps that leaves the TCP windowing issue. I've tried the
> workaround, which is
> 
> # echo 0 > /proc/sys/net/ipv4/tcp_window_scaling
> 
> It doesn't make any difference. I even logged into the router and did
> the same, plus ca change.
> I'm stumped! Any suggestions gratefully received.
> 
> Regards,
> Tom SW

You're sure it isn't something trivial like the firewall configuration?
You've tried it with the firewall down, just to check?

(Okay, maybe that was so obvious that you thought it wasn't worth
mentioning),

-- 
 All the best,
 John
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