[Snort-users] Purchasing New Equipment for Snort

Martin Holste mcholste at ...11827...
Mon Apr 18 22:58:20 EDT 2011

Since Snort won't be utilizing the disk much, you should get one beefy
box (>=16 cores) and a ton of ram and disk and run it all on one box.
You could get two, but this saves a lot of sys admin overhead.

Make sure your tables are using innodb and allocate at least as much
key buffer memory as it will take to fit the keys for your tables in
memory.  You can find that with the index_length column in the
information_schema.tables system table.  Also, be sure to use Mysql
5.5 as it has many performance improvements.

Postgres trolls/snobs will also point out that pgsql has better
concurrency rates, and so may be better suited for this scenario.

On Monday, April 18, 2011, Merida, Dylan <Dylan.Merida at ...15124...> wrote:
> Hash: SHA1
> Hey All,
> It's come time for EKU to do some equipment upgrades. I have the opportunity to throw some beefy hardware at snort and its database server. Our current set up is running on one single core 3.2 GHz Xeon with 12 GBs of RAM. The MySQL database is hosted on a separate box that's a multicore Xeon; it also serves one other purpose, so the load is quite high (and slow) when performing extensive database queries. I'm currently running one sensor at egress/ingress to the internet. I would like to deploy 4 more sensors throughout our network and run this on one multicore box. We currently average about 1.5 million alerts a day on a gigabit pipe that averages around 300 Mbps. Queries are quite slow when examining a large dataset (like 24 hrs), so I also want queries to be extremely fast in BASE and Snorby.
> My question is this: If I could buy two servers with any specs that I wanted, what would allow me to run 5 sensors on one box and a beefy MySQL database on another that can run most queries in under 10 seconds?
> So far, we've tried some tests with a large storage box with SSD cache running FreeBSD and ZFS. There appear to be some limitations in the FreeBSD MySQL daemon. I'd also like to know what OSes you might suggest. (We're fans of Red Hat, but are open to anything.) Also, would you run Barnyard on the sensor box or push the alerts to the DB server and then parse them from there?
> Let me know what you think.
> Thank you,
> Dylan Merida
> Security Analyst
> Information Technology
> Eastern Kentucky University
> NOTE: IT @ EKU will NEVER request passwords or other personal information via email. Messages requesting such information are fraudulent and should be deleted.
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