Snort mailing list archives
RE: Looking for recommendations for distributed Snort GiGE Sensors (network architecture described in message)
From: "Tim" <tim () otten co uk>
Date: Tue, 9 Dec 2003 13:11:52 -0000
Although I am not an expert on snort at high speeds, I have read of several problems with high speed situations. First of all I doubt very much that using a 33MHz bus is a good idea. I would go for PCI-X 2.0+ or at least PCI-X. Also you would need to run a custom version of Libpcap. And the database server I believe would need to be scsi & raid configuration with plenty of ram. This Post may Help: 'I'm working to optimize Snort on a gigabit Ethernet connection. The system is a dual 2.8ghz Xeon Dell PowerEdge with a gig of RAM, Phil Wood's Libpcap 8 library, running Snort 2.04. I've paired down the rule set eliminating most irrelevant rules for this subnet. I am using a Cisco Catalyst 4000 series switch to mirror (SPAN) all traffic on the switch to the dedicated promiscuous Intel e1000 adapter in the Snort system. The average traffic utilization of the switch is under 15% but I'm still dropping up to 40% of packets. I'm also using the unified log and alert output facilities and mudpit to process the logs. Snort is not doing any other type of logging. Today I also noticed that Snort is consuming 99.9% of one of the 2.8ghz processors (I know Snort is not SMP capable yet). My question is: is that unusual? I'm surprised it's pegging a 2.8ghz processor. Am I using CPU intensive preprocessors? Any wisdom from fellow Snorters would be most appreciated. I'm working to compile the latest Intel e1000 driver now to see if that helps.' Regards Tim Otten -----Original Message----- From: snort-users-admin () lists sourceforge net [mailto:snort-users-admin () lists sourceforge net] On Behalf Of Landon Stewart Sent: 09 December 2003 07:49 To: snort-users () lists sourceforge net Subject: [Snort-users] Looking for recommendations for distributed Snort GiGE Sensors (network architecture described in message) Any recommendations on hardware (for now) are greatly appreciated. Cost effectiveness is important so a minimum to do the job. I don't want to get into load balancing on multiple 100mbit links if possible as the iron is too costly. - I've seen discussion about bus speeds and the maximum data that can be processed with those bus speeds. What is my minimum? Could I get away with 33MHz bus? - What if I use fiber GiGE links? Network description (hardware/throughput): NOC 1: Router - CORE1 - Cisco 12008 GSR PIPE 1 Gbit/s AVG 140 Mbit/s PEAK 184 Mbit/s Router - CORE2 - Cisco 12008 GSR PIPE 1 Gbit/s AVG 102 Mbit/s PEAK 180 Mbit/s Both routers distribute traffic to their own distribution switches (each one is a CAT5513) Visualize this at: http://nsssc.superb.net/img/dca1-fall2003.gif NOC 2: Router - CORE1 - Cisco 12012 GSR PIPE 1 Gbit/s AVG 110 Mbit/s PEAK 130 Mbit/s Router - CORE2 - Cisco 12012 GSR PIPE 1 Gbit/s AVG 200 Mbit/s PEAK 280 Mbit/s Both routers distribute traffic to their own distribution switches (each one is a CAT4912G) Visualize this at: http://nsssc.superb.net/img/dca2-fall2003.gif - If you could look at the URL's listed to visualize the networks, where would the best place be to put mirrored sensors and what kind of hardware would I require? - What kind of requirements would I need for the centralized database system to store the alerts given the amount of IDS data that might be produced? Does it need SCSI or striped RAID? Could I get away with a good SCSI drive and some good RAM? - Other than ACID what are the other *good* analysis consoles? I had thought maybe EACH core router (or distribution switch) would require: 1 x fast machine like a DUAL 2.4GHz with 1GB of RAM 1 x GiGE interface (fiber?) - Could I get away with one sensor for each NOC and each of those sensors would have two GiGE interfaces or would that be too much data to process? I doubt I could do two CORE routers on one machine but what do you think? More complete network architecture information can be found at: http://nsssc.superb.net/information/dca1net-info.php and http://nsssc.superb.net/information/dca2net-info.php Thank you to anyone who responds with any information! ------------------------------------------------------- This SF.net email is sponsored by: IBM Linux Tutorials. Become an expert in LINUX or just sharpen your skills. Sign up for IBM's Free Linux Tutorials. Learn everything from the bash shell to sys admin. Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users ------------------------------------------------------- This SF.net email is sponsored by: IBM Linux Tutorials. Become an expert in LINUX or just sharpen your skills. Sign up for IBM's Free Linux Tutorials. Learn everything from the bash shell to sys admin. Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users
Current thread:
- Looking for recommendations for distributed Snort GiGE Sensors (network architecture described in message) Landon Stewart (Dec 08)
- RE: Looking for recommendations for distributed Snort GiGE Sensors (network architecture described in message) Tim (Dec 09)
- <Possible follow-ups>
- RE: Looking for recommendations for distributed Snort GiGE Sensors (network architecture described in message) Val P (Dec 10)
- RE: Looking for recommendations for distributed Snort GiGE Sensors (network architecture described in message) Michael Steele (Dec 10)
- RE: Looking for recommendations for distributed Snort GiGE Sensors (network architecture described in message) Jason Haar (Dec 11)
- RE: Looking for recommendations for distributed Snort GiGE Sensors (network architecture described in message) Landon Stewart (Dec 11)