Find and allow ssh clients

thangappan · 03-29-2010, 06:39 AM

Is there any way to find out from this machine, this user is logged into my machine using any mechanism or command?

Also I can allow this users can put ssh to my system. Is it possible?

Sayan Acharjee · 03-29-2010, 06:42 AM

Quote:

Originally Posted by thangappan

Is there any way to find out from this machine, this user is logged into my machine using any mechanism or command?

Also I can allow this users can put ssh to my system. Is it possible?

Not sure what are you asking, but you can view the currently logged in users with w or who command.

PMP · 03-29-2010, 08:44 AM

Quote:

Also I can allow this users can put ssh to my system. Is it possible?

Yes It is possible

thangappan · 03-29-2010, 10:28 PM

I too find out using SSH_CLIENT and SSH_CONNECTIONS environment variable it could be done.

Is there any other way?

alinas · 04-02-2010, 05:16 PM

I like the following command:
netstat -a | grep ESTABLISHED
It's not for showing users or specifically ssh, but useful for exploring connections...

portamenteff · 04-03-2010, 02:01 AM

Quote:

Originally Posted by PMP

Yes It is possible

It certainly is. If you're running sshd (ssh daemon) anyone with a username and password can login unless you've locked them out. if you are on a router or switch, or hub, you need to port forward port 22 on that device. that is ssh's port usually. goto this address: http://www.whatismyip.com/
and have the user input that address. i'd use

Code:

ssh -l username 76.25.x.x (whatever that address is)

If you're not running sshd type sshd in the terminal. If you don't have it installed, go into your package manager and get it. although every system i've had has shipped with it.