Have you tried using the verbose flag with ssh?  It spits out a lot of 
information, but you could get some insight if it is getting caught up 
with authentication or resolving hostnames.

I usually use it with three Vs:

ssh -vvv myserver

-Aaron


On 12/15/2011 06:34 AM, Rob Owens wrote:
> On Thu, Dec 15, 2011 at 08:06:14AM +0100, Emmanuel Le Normand wrote:
>> Hi,
>> On Wed, 14 Dec 2011 20:46:24 -0500
>> David Hopkins<dahopkins...@gmail.com>  wrote:
>>
>>> I checked and resolv.conf had entries for IPv6 and also had a weird
>>> entry of
>>>
>>> 127.0.1.1 ncslts3
>>>
>>> on the ncslts3 server. I commented out all the IPv6 entries and also
>>> the above line.  Logins still take about 25 seconds to authenticate,
>>> but that is less than the 30 second timeout limit so they are working.
>>> However, this is still much longer than the 3-5 seconds that it was
>>> requiring before all this started.
>>>
>>> It still takes 30+ seconds to ssh to either ncslts3 from a thin client
>>> shell using either the IP address or the hostname. nslookup resolves
>>> either immediately (no lag) in the shell.
>>>
>>> It is baffling and I'll come back to address the time issue in the
>>> morning.
>>>
>>> Thanks for the suggestions, they are truly appreciated.
>>>
>>> Sincerely,
>>> Dave Hopkins
>>>
>> Perhaps it's bad idea, did you have check your authentification
>> system ? LDAP ? pam.d for SSH or common-* ?...
>>
> At this point, I'd say you should probably also check your network
> hardware.  Switches, cables, network cards...
>
> -Rob
>
> ------------------------------------------------------------------------------
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> Server virtualization is being driven by many needs.
> But none more important than the need to reduce IT complexity
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-- 
Aaron McPhall


------------------------------------------------------------------------------
10 Tips for Better Server Consolidation
Server virtualization is being driven by many needs.  
But none more important than the need to reduce IT complexity 
while improving strategic productivity.  Learn More! 
http://www.accelacomm.com/jaw/sdnl/114/51507609/
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