Snort not generating alerts

["Matt ." <sttwok82 () gmail com>]

I'm ramping up on Linux and Snort, so not highly familiar with them yet.

That said I've installed Snort and Snort Report onto Ubuntu 12.04 via the
instructions at the following URL and fixed the errrors that prevented
snort and barnyward2 from running.
http://www.symmetrixtech.com/articles/016-snortinstallguide2953.pdf

At this point I am not able to determine why it's not generating alerts,
the log files and are empty. If I add the following lines uncommented out
to the bottom of snort.conf, data is put into the log files and database.
But once I comment out the lines nothing is generated.


#alert ip any any -> any any (msg:"Got an IP Packet";
classtype:not-suspicious; sid:2000000; rev:1;)

#alert icmp any any -> any any (msg:"Got an ICMP Packet";
classtype:not-suspicious; sid:2000001; rev:1;)
#alert icmp any any -> any any (msg:"ICMP Large ICMP Packet"; dsize:>800;
reference:arachnids,246; classtype:bad-unknown; sid:2000499; rev:4;)


I've searched online and am stumped. Any assistance, pointers,
recommendations would be much appreciated.

Thanks,
Matt

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