Snort (Intrusion Detection System) FAILED

Need some more information

maybe if exist, post the Logfile /var/log/snort

greets

Cant read file correct.

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please Post var/log/snort "alert" file and var/log/messages

think you have a problem with your Firewall

much entrys with

Apr 28 06:19:12 firewall syslog-ng[1235]: Error opening file for writing; filename='/var/log/firewall', error='Is a directory (21)'

Check your snort Config,
uncheck all Network and try to use only "red"

what kind of firewall Appliance .. Ccommunity ? Wich version?

on wich Network you have snort enabled ?
on all.
maybe try to check if any interface do this Problem.