Provide SSH to someone w/ dynamic IP address {Scanned}

[MKlinke]

On Thursday 09 September 2004 00:15, Tom Klem wrote:
> It is a very interesting problem.
>
> I know that anything is possible, and I suppose that any port
> scanner will find port 22 open at any given time. Have you
> considered using another port? At least with that, they get a
> port open, for which they do not have a cookbook recipe, or
> hacker kiddie script. They are not sure what the purpose of the
> 'mysterious' port is, etcetera.
>
> Just a thought.
>
> Tom
>
 
In the case of an off-the-shelf sshd running on an unknown port it's 
trivial to discover with a simple carriage return:

07:48:51 # telnet <ip-address> 22
Trying <ip-address>...
Connected to (<ip-address>).
Escape character is '^]'.

SSH-1.99-OpenSSH_3.5p1
Protocol mismatch.
Connection closed by foreign host.

Regards, Mike Klinke