[Snort-users] Stateful portscan detection anybody?

John Pettitt jpp at ...230...
Wed Aug 30 23:30:13 EDT 2000

I notice that portscan detection gets completely confused by domain servers 
- it's detecting DNS replies as scans - this is made worse by the fact that 
I have mailing lists running so I get flurries of DNS activity when a 
messages is sent to a list.

It seems to me that for portscan detection to be useful under such 
condition it needs to have some concept of state that allows it to ignore 
replies to requests from $HOME_NET systems.

Is anybody out there working on such a thing?


John Pettitt                                     Email: jpp at ...230...

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