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| Subject: | Re: [Snort-sigs] [snort] why disabled "BAD TRAFFIC data in TCP SYN packet" rules on snort v2.3.3 (and before) ? |
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| Date: | Thu, 19 May 2005 21:05:52 -0500 |
On Fri, 2005-05-20 at 09:39 +1200, Russell Fulton wrote:
bad-traffic.rules:# alert tcp $EXTERNAL_NET any -> $HOME_NET any
Ah! I had not notice that it had been disable -- I was seeing some (what I think were MTU discovery or similar services) sending blocks of NULLs in SYN packets. I'm guessing that these 'false +ves' out weighed the utility of the rules.
I had added three rules to the Bleeding rules that can be used to pass the false positives that are created by F5's load balancers. There might still be use for the original Snort rule. Those rules are in bleeding-scan.rules Cheers, Frank
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