Rule help with multiple port negation

["McKim, Tim" <McKim () nsf org>]

I want to create a rule that ignores three ports but alerts on everything
else. 


Something like 

alert tcp !$HOME_NET (!80 && !443 && !110) -> $HOME_NET any ..........

I just haven't been able to find what the correct syntax is or if it is even
possible. If anyone knows how to do this I would appreciate the help.

Thanks, 

Tim 


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