Firewall Wizards mailing list archives

Not getting all our denied logs from Cisco FWSM


From: Kim Cary <Kim.Cary () pepperdine edu>
Date: Tue, 29 Aug 2006 09:40:38 -0700

While we're slogging through the beauracracy and shell game of our  
TAC case at Cisco, I thought I'd ask the list whether any of you have  
seen intermittent failures to send 106100 'denied' log entries from  
your FWSM. We're on 2.3(3). As it turns out, these entries our  
important to our operations and we're only getting about 10% of them.

We don't seem to be able to get around the deny-flow-max default of  
4096. One would think that when those flows are exceeded, you would  
just get the messages logged, wouldn't you? Am I missing something,  
or is the firewall just throwing these away. We don't want it to do  
that!!

I know Cisco is trying to not pass along a DOS here, but is there any  
way to get them to STOP holding my hand and just send the logs?

The really annoying thing is, we get 100% of our 'permitted' 106100,  
so I guess if someone is DOS-ing an open port they can get our syslog  
server 'dos-ed' too.
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