Hi,

I was able to telnet machine a day before, but the next day I was not able to. There were no changes made in between. I am able to ssh. So, I think the limit of users that can do telnet, is exceeded...? How can I resolve it without rebooting the machine...


Thanks and waiting for ur help.

Have you checked your /etc/hosts.allow and /etc/hosts.deny files to see if you have issues there?

I have checked there. No issue. I am very sure that there are some limits the user can login at a time. Now, some one logged in but did not exit and just closed his terminal... so telnet session is still on.. and such it exceeded the limit.. now i want to know how to grow that limit...

Limits can be placed by editing the /etc/security/limits.conf file. This is part of the "Pluggable Authentication Mechanism" or PAM. I think the proper syntax would be <domain> <type> <item> <value> per line, for example:

Let me know if this helps.

If you can log in using ssh with that user, you should be able to kill off the other sessions on the machine. The trick is to identify them.

The command will show information which should be helpful including the PID of the login shell. You can check what that session is "doing" using You should be able to kill off session which have been left idle from your ssh session, assuming it's the same user.

I'm assuming you're logging into a machine using bash as the shell (do "echo $SHELL" to find out ). If so, you can edit the user's .bashrc file (or the global /etc/profile if you want the change to be applied to all users), adding the line which will make the shell auto-logout if left idle for two minutes (120 seconds).

You might want to use a timeouot larger than this - it's annoying for users to get auto-logged out frequently. Maybe set it to an hour (3600).