View SSH port log?
I know how to check /var/log/secure but what I want to be able to determine is if anyone is using my server as a tunnel and if so what IP they are eventually connecting to, secure logs don't show where a connection goes just where the user has connected from.
Example: user Tom connects via SSH tunnel to server B on 18.104.22.168:6688 . Server A is obviously the conduit.
Where in the logs on Server A can I find the IP address that Tom connected to? Can I?
Server is Centos 5.1. Hope you can help!
so from your example, user1 ssh connects to server1, from there he initiates another connection using ssh client to some where else?
If that is correct then I don't think the ssh client will be able to log in that way. You may need to do some firewall management, even if its just a pass thru, to capture the info you need.
It's more a question of if user Tom has Putty set up to create an SSH tunnel using Server A to get to Server B. Would that sort of action be recorded in the log and if so where?
No if u are the serve As root user check the netstat -anp that will display the
current connections from the server and to the server ..