Question

How can I determine what port "rsh" is using?

Asked by: gsalcedo

Hi,

I am currently having some "rsh" issues.  Do you happen to know what port "rsh" normally use?  How do I check?

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Asked On
2005-10-25 at 14:06:42ID21607443
Tags

rsh

,

port

Topic

Sun Solaris

Participating Experts
2
Points
125
Comments
8

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Answers

 

by: synrstPosted on 2005-10-25 at 14:40:30ID: 15158253

rsh listens on port 514 (tcp). You can find service/port number mappings for most services in /etc/services normally.
The rsh demon is spawned from inetd, so if you want to see how its started, you can look for rsh in /etc/inetd.conf

 

by: synrstPosted on 2005-10-25 at 14:46:34ID: 15158302

A bit more info:

man pages for the rsh daemon can be found here:
http://www.manpages.info/sunos/in.rshd.1.html

and man pages for the rsh client program is found here:
http://www.manpages.info/sunos/remote_shell.1.html

 

by: gsalcedoPosted on 2005-10-27 at 07:59:25ID: 15171391

Do you happen to know how I can establish "rsh" communication between two Sun servers?

 

by: gsalcedoPosted on 2005-10-27 at 08:18:17ID: 15171639

In addition to the question above to explain why I need rsh to run also with ssh...

The backup application that is running within the environment that I work in requires rsh to do the file transfer to the master backup server.  This is the reason why I need to find out why rsh is not working properly.  Is there a way I can troubleshoot and find out what the problem is located?  Is there a way to determine if the Cisco router that is in the environment is preventing the "rsh" services from working within the environment.  I have noticed and read the rsh listens to port 514 by default.  What command do I use to determine if that is the port that rsh is listening to?  I apologize for all of these questions.

Thank you.

 

by: gsalcedoPosted on 2005-10-27 at 08:27:49ID: 15171763

Here is another addition to my question... When I use the rsh command, I would get back an error message.  Here is the command that I used and error message that I received.

rsh <hostname> -l <username>

Protocol error, <hostname> closed connection

Thank you

 

by: ahoffmannPosted on 2005-10-29 at 00:54:04ID: 15184421

rtools have some security issues, I'd use ssh/scp instead ...

Said this, rtools rely on .rhosts, see
  man rhosts
  man hosts.equiv

 

by: gsalcedoPosted on 2005-10-31 at 08:50:35ID: 15194144

Hi "ahofmann,"

Thank you for your advice, but I do not have an option to use another service.  The backup application is relying on "rsh."  On the other Sun servers that are in the same environments works well with rsh, but for some reason, this particular system is having some issue.  All the servers are identical as for the hardware and OS version (Solaris 8).  

Lets say that I am trying to rsh from a workable Sun server (Alpha) to another Sun server (Beta).  When I run the rsh test command from Alpha to Beta, it works fine.  I would get a response "beta."

   rsh beta hostname

When I run the same command to the server that is having an rsh issue (Gamma), I would not receive any response for about 20 seconds and then receive an error message as follows....

   gamma: Connection refused

Do you or anyone have any idea what I should do to have rsh run properly on the "Gamma" server?  The "ssh" service works fine, but I am just having an issue with rsh.  I have checked the .rhosts file and it is allowing permission for the Alpha server.  I have also checked the hosts.allow and hosts.deny files.

Thank you,

 

by: ahoffmannPosted on 2005-10-31 at 10:19:54ID: 15194831

> ..I would not receive any response  ..  Connection refused
euther there is nor rlogind/rshd running on gamma, or there is a firewall inbetween

20120131-EE-VQP-002

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