[Snort-users] 1.8.6 problem: Misdetection and hangup

Jesus Couto jesus.couto at ...3830...
Tue Jun 4 06:37:12 EDT 2002


This is the setup: A RH 7.2 machine running snort 1.8.6, 2 interfaces, 
the one we are listening to eth1 connected to a hub with another 2 
machines, (the "attacker") and (the "victim").

Problem: Launching some simple portscanning attacks like

    nmap -sT -p 1-40000 -r

from the attacker machine gets reported as "MISC source route lssr" by 
snort in IDS mode, and after reporting the first 3000-4000 events, snort 
hangs completly.

Not only the packets dont have the lssr option anywhere, as checked by 
using Ethereal, but snort in sniffer mode also shows them to be without 
options, and the logging of the packets by snort at the ACID console 
shows the packet having a few other options (TS) but nothing about 
source routing.

Any ideas? If more info is needed to debug it just tell me what you need.

Jesus Couto F.

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