On Saturday 26 February 2011 07:49:44 Adam Carter wrote:
> > The nc command does nothing when run from the same host I'm trying to
> > ssh in to.
> 
> Ok so you may not have an ssh problem (so ignore the ssh specific stuff for
> now) you have a network problem. It will be either routing or firewalling.
> If you can ping the box, then its a firewall problem. So, try pinging it
> first, and if that works then you know that routing is in place and its a
> firewall problem. If that doesn't work try traceroute to see how far you
> can get, and the last hop may provide clues as to why you can access it by
> sending an ICMP message. Post back what you find.

Depending on configuration of routers and firewalls ICMP packets may be 
dropped, so if plain ping/traceroute fails use httping and tcptraceroute (or 
traceroute -T -p 22)
-- 
Regards,
Mick