[lug] ssh/scp hanging

Zan Lynx zlynx at acm.org
Mon Dec 8 15:26:00 MST 2003

On Mon, 2003-12-08 at 14:51, Michael Wegener wrote:
> I'm building a develpment server on RH9 and am having trouble getting
> files to it. I can ssh out fine, and I can ssh in fine, but only using
> PuTTY. If I try command line ssh/scp (using various switches and
> logins) it just hangs. ssh -v doesn't help at all: it just says ssh
> was called and then stops forever. Since this is a new installation, I
> tried generating an rsa keyset, but I don't remember ever needing to
> do that before?
> Any ideas?

I would check for problems with reverse DNS.  Try the command "dig -x
<IP address>' (and try with your IP and your development server's IP). 
Dig should either return with a DNS name, or it should immediately
return with an unknown name.

If you're using your own DNS servers for internal IP addresses, try
adding zones for reverse DNS in your internal IP nets, even if the zones
are empty.

How long have you tried waiting for SSH to return?  It shouldn't hang
forever, only 6 minutes or so, if it is a DNS problem.
Zan Lynx <zlynx at acm.org>
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