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  3. September 2007

Re: Secure Telnet Between i5's ?

Donald Whittaker wrote:
I don't think SSL uses a new IP address - I think
it uses an ephemeral port for the connection (that is,
the initial connect request comes across on 992, but
the actual user job ends up on another port number).

No, you're confusing TELNET with FTP. There's no ephemeral ports used in TELNET... it's just a straight TCP connection on a port. By default, that's port 23 for plain-text and port 992 for SSL.


No change to IP address or port is needed during the run of the protocol. That's FTP that uses the main port for commands and ephemeral ports for data transfer.

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