SSH: Capturing the Remote Server

[dewa]

Hi All,

Our environment is implementing SSH.  After we launch ssh (e.g. ssh user@host1), we login to the remote server.

Is there a way to capture the remote server which the user login to?  is that available in log file(s). Thinking if we can enable one of sshd_config or ssh_config options to capture the remote server in log file.

Can anyone help me please?

Thanks and Regards,

Dewa

[Jeff_Traigle]

Not sure what you mean exactly. If you're wanting a message on the remote server saying user logged in via ssh, that's logged in /var/adm/syslog/syslog.log. It should also be logged in /var/adm/wtmp so you can see the login via the last(1) command although that will only show the pty used, not the protocol used to login.

[dewa]

Hi Jeff,

Thanks. What I mean that I need to record the remote server. Let say I run command "ssh dewa@hostA", Is there any way to capture the information abt remote server (which is hostA) after calling ssh?  For instance, the log file may contain "18 Nov 2011 10:05   ssh    dewa    hostA". So from that information I will get to know that ssh run by user dewa to remote server hostA.

Regards,

Dewa

[Jeff_Traigle]

I see. So you want the logging on the client side. The only logging I can think of that could occur on the client side is:

1. the interactive shell history, which isn't centralized and can be wiped by the user
2. via the auditing facility available in HP-UX, which eats up a lot of disk space from what I understand seeing other's posts over the years
3. creating a wrapper script to log it somewhere that the user can write to, which necessarily means that the user can either wipe that log or find the actual binary to run directly

Option 2 is the surest bet.

[Dennis Handly]

>So from that information I will get to know that ssh run by user dewa to remote server hostA.

The logon info is available on hostA with last(1), is that good enough?  It includes the client servers name.