Linux and packet loss

["Matthew Collins" <Matthew.Collins () northernregistrars co uk>]

I've got snort 1.7 running on a Linux 2.2.19 (Debian) system.

The code red worm is starting to get going now, and I've noticed an oddity. I've got one alert for .ida attempt in my 
snort log, but I've got 6 attempts (at two minute intervals) in my web server log. So snort has missed 5 attempts.
Now the internet connection is only a 128K line. Snort is logging all traffic (in TCPdump mode). Is there any way I can 
figure out how snort has missed these packets?
I know that pcap stats do not work on Linux, so I've got no way of verifying that dropped packets are to blame. Any 
other ideas?



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