> * telnet into port 22 from a host
>
> telnet yourserver 22
>
> the response should be:
>
> # telnet yourserver 22
> Trying xxx.xxx.xxx.xxx...
> Connected to yourserver.yourdomain.com (xxx.xxx.xxx.xxx).
> Escape character is '^]'.
> SSH-2.0-OpenSSH_3.9p1
> ^]
> telnet> quit
> Connection closed.
>
> If that works, then your sshd is working fine.
>

Thanks, Michael.

I have only a Mac to telnet to the Linux machine. What I got from  
telnet is:

--------------------------------------
  telnet xxx.xxx.xxx.xxx 22
Trying xxx.xxx.xxx.xxx...
Connected to xxx.xxx.xxx.xxx
Escape character is '^]'.
SSH-1.99-OpenSSH_3.9p1

Protocol mismatch.
Connection closed by foreign host.
--------------------------------------------------

Is this a problem because I was using a Mac ?

Wen