RE: Source Port 0 traffic

["Sheahan, Paul (PCLN-NW)" <Paul.Sheahan () priceline com>]

I use this rule and it works fine:

alert ip any 0 -> any any (msg:"Source port zero attempted";)

I also noticed that on all occasions that this has been tripped, it has been
because the packet is fragmented.....



Paul Sheahan
Manager of Information Security
Priceline.com
paul.sheahan () priceline com



-----Original Message-----
From: Buchanan, Randy [mailto:randy.buchanan () creditunion mb ca]
Sent: Friday, April 12, 2002 10:45 AM
To: 'snort-users () lists sourceforge net'
Subject: [Snort-users] Source Port 0 traffic


Hello users, currently using snort 1.8.4 and I seem to be having a problem
logging traffic with a source port of 0. I do see the ICMP response from our
host but the initial packet is not logged. The rule being used is 

alert tcp $EXTERNAL_NET any <> $HOME_NET 0 (msg:"MISC TCP port 0 traffic";
sid 524; rev;1) 

Can anyone point me in the right direction """

Thanks,

Randy 


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