Not directly answering your questions, but maybe you are looking for something like port knocking (google for other references, there are plenty...). The idea is to generally keep all ports closed, and only open specific ones (HTTP, SSH, whatever...) temporarily, if a magic pattern of requests is made to selected closed ports (typically only known to the initiated clients).

This isn't supported by any browsers (AFAIK), but there is some prototype code in Perl, in case you want to play with it... Have fun!

In reply to Re: How to implement a fourth protocol by almut
in thread How to implement a fourth protocol by Moron

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