[Snort-sigs] Not-ing out ports
johwiltb at ...2420...
Mon May 13 07:01:19 EDT 2013
So I have a question. When dealing with bi-directional signatures (I know,
they aren't ideal in the least, but sometimes you can't help who develops
your signatures), if you choose to not-out a port (as in !<port number>),
does snort run a boolean OR on the traffic (as in 'if source port != <port
number OR destination port != <port number>)?
Reason is, I have a signature that's header is 'alert tcp any any <> any
!25', yet it is still alerting off of traffic over port 25. I'm sorry if
these seems confusing, I can't think of a better way of stating this. Any
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Snort-sigs