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Full Discussion: SSH operation timed out
Homework and Emergencies Emergency UNIX and Linux Support SSH operation timed out Post 302633377 by laz on Tuesday 1st of May 2012 10:17:06 PM
Old 05-01-2012
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Greetings,

As has been previously mentioned, more information about your network topology would probably help in troubleshooting this. That being said, let me toss out a couple situations that might apply to your problem, or if not, maybe they can help get you thinking in the right direction.

First, just because a ping does not succeed does not mean there is a problem. If you are on different subnets or networks, that might be normal. Most networks block ICMP (ping) traffic from entering their networks if not being more restrictive. If however, you have been able to successfully ping before, and now you cannot, then it would seem that there is indeed a network problem and you should contact someone on your network team.

Second, most UNIX and Linux servers use TCP_WRAPPERS to protect network services on their server. This means that in the hosts.allow file, there is most likely an entry allowing you and your computer access via SSH. This is done by allowing your IP address (or subnet perhaps) or hostname access to the system. If by some chance the IP address on your PC has changed (say, by DHCP) that could cause the error you see. Or if they are using a hostname to allow access, it could be a DNS problem if the server you are connecting to cannot perform a reverse DNS lookup on your IP. So there are a couple things to check, make sure your IP hasn't changed and make sure that reverse DNS is working properly for that IP. Plus, the server you are connecting to could be having DNS problems even if DNS in general is functioning on your network.

I hope this helps, please post an update with more information if you are still having problems, or if you find the solution.

Thanks,

Laz
 

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LEARN ABOUT SUNOS

list-virtual-servers

asadmin-list-virtual-servers(1AS)				   User Commands				 asadmin-list-virtual-servers(1AS)

NAME

       asadmin-list-virtual-servers, list-virtual-servers - gets the virtual servers

SYNOPSIS

       list-virtual-servers --user admin_user [--password admin_password] [--host localhost] [--port 4848] [--secure|-s] [--passwordfile filename]
       [--terse=false] [--echo=false] [--interactive=true]

       Gets all the virtual server elements. This command is supported in remote mode only.

OPTIONS

       --user		       authorized domain application server administrative username.

       --password	       password to administer the domain application server.

       --host		       machine name where the domain application server is running.

       --port		       port number of the domain application server listening for administration requests.

       --secure 	       if true, uses SSL/TLS to communicate with the domain application server.

       --passwordfile	       file containing the domain application server password.

       --terse		       indicates that any output data must be very concise, typically avoiding human-friendly sentences and favoring well-
			       formatted data for consumption by a script. Default is false.

       --echo		       setting to true will echo the command line statement on the standard output. Default is false.

       --interactive	       if set to true (default), only the required password options are prompted.

       Example 1: Using list-virtual-servers

       asadmin> list-virtual-servers --user admin --password adminadmin
       --host localhost --port 4848
       Command list-virtual-servers executed successfully

EXIT STATUS

       0		       command executed successfully

       1		       error in executing the command

       asadmin-create-virtual-server(1AS), asadmin-delete-virtual-server(1AS)

J2EE 1.4 SDK							    March 2004					 asadmin-list-virtual-servers(1AS)
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