Being new user to snort, I'm not quite up to speed on the rules language.
However, I don't see how to program a rule that would trigger on "all
destination ports except these specified well known ports".

I'd like to log all tcp SYN attempts to any port that aren't in a well known
list such as pop3, www, ftp, smtp, etc.

Am I really, really missing something simple? Appropriate embarassment will
follow if I am.

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