Can you find out the IP SSH-ing your computer?
SSH connection info is also stored in the SSH_CONNECTION environmental variable.
You should be able to view this by entering echo $SSH_CONNECTION.
Yes. Just run netstat:
netstat --tcp --numeric
Look for the IP using the port 22. --numeric forces netstat to show IPs and --tcp only shows TCP connections
Yes, and here is how in Windows:
The netstat -a command shows all conections as they happen.
I am not a Linux guru, but it is very similar, and the actual base command is the same, I believe:
http://www.thegeekstuff.com/2010/03/netstat-command-examples/