This may be a very trivial question but any help would be appreciated.

Imagine there are 2 machines A and B. They are in the following config

A----Firewall------B

A needs to have telnet access to B

So you would allow access across port 23 (TCP) on the firewall rulebase.

Am I right in thinking that this constitutes the destination port on the
packet that is sent from A to B? Or is it the source port?

Also, on the packets sent from B to A. I assume the source and destination
ports are randomly chosen. Is that correct?

Thanks a lot for any help.
Kind regards,
Mohmed Haji
Information Systems - Logica UK Ltd
tel: +44 020 7446 2112 
fax: +44 (0)20 7468 7008


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