Been using them since they first came to market. Spam is a non-ending escalation. You and Cuda adjust and block, they adjust and get past it. It is a detail orientated battle, you have to dig into the details of where it is coming from and go after it that way. For example this summer SoftLayer's network was hitting us with about 5,000 messages a day. Moving to new subnets every day. Looking at it I found a common theme on the rDNS for the sources and put a regex block on them.
You are going to have to dig in and find the common thread on these messages and adjust. Considering you are seeing a 5000 per day increase in messages I would say you will find it pretty quick. It's one out of control spammer nailing you. From: [email protected] [mailto:[email protected]] On Behalf Of Jake Gardner Sent: Friday, December 18, 2015 9:38 AM To: [email protected] Subject: [NTSysADM] Barracuda Spam fw appliance Does anyone here use one? We have a model 300 and lately we are getting absolutely hammered with SPAM that the 'cuda just won't catch. I have opened a few tickets with them about the issue and all they say is that my firewall is blocking the 'cuda from checking websites. I've checked my firewall and I don't see any blocks and the 'cuda is in a policy with no outbound restrictions. The only thing that seems to slow it down is rate control. I turned it down to 20/30mins. In the last 9 hours it controlled 3700 and only outright blocked 1450. We see about 17k messages a day on average. A couple months again we were averaging 12k. Thanks, Jake Gardner IT Administrator 267-352-2020 Ext. 246 www.ttcdas.com<http://www.ttcdas.com/> ***Teletronics Technology Corporation*** This e-mail is confidential and may also be privileged. If you are not the addressee or authorized by the addressee to receive this e-mail, you may not disclose, copy, distribute, or use this e-mail. If you have received this e-mail in error, please notify the sender immediately by reply e-mail or by telephone at 267-352-2020 and destroy this message and any copies. Thank you. *******************************************************************
