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Snort on OpenWrt: Guarding the SOHO perimeter

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If you're edgy about security for your SOHO LAN, you might want to consider moving your first line of defense out past your firewall. How about on your router, for example? If your router runs OpenWrt, you can do exactly that, by running Snort, the open source intrusion detection system (IDS) project that has become the most widely deployed IDS in the world. Throw in the firewall that comes out of the box with OpenWrt White Russian, and suddenly the perimeter seems a lot more secure.

Nicholas Thill -- known as Nico in the OpenWrt community -- maintains three separate packages for Snort in his repository of packages. They include a plain Jane version, without any support for logging to a database, and two database-specific packages: one for MySQL and one for PostgreSQL. All are based on the Snort release 2.3.3-1 and are considered to be in a testing state and not yet included in the official release.

For the sake of simplicity, I'll discuss the plain Jane installation in this article.

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