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Suggestion: Rather than enter the IP addresses into snort.conf, it might be easier to manage something like this if we reference files that include the IP lists using a predefined syntax. That way you can download community based lists daily without ever having to update snort.conf each time.
Something like this: preprocessor iplist: < noalerts > < nodrops > <directory> whitelist name <filename> blacklist name <filename> blacklist name <filename>
preprocessor iplist: whitelist trusted /etc/snort/lists/trusted.list blacklist ET-dshield /etc/snort/lists/dshield.list blacklist ET-CC /etc/snort/lists/cc.list
On Wed, May 13, 2009 at 2:50 PM, Martin Roesch <firstname.lastname@example.org> wrote:
> Hi everyone,
> I wrote a patch for Snort 18.104.22.168 that implements IP blacklisting as a
> preprocessor in Snort over this past weekend. We talked about this
> last week on the mailing list in regards to trying to implement
> blacklisting using regular Snort rules and how well that doesn't work.
> This code has been tested against Snort 22.214.171.124 only. I've tested
> builds on OS X, Ubuntu and Fedora so far. It requires libdnet (or
> dumbnet-dev for those of you on Debian-based distros) to build
> properly. Check the README file that comes with it for instructions
> on patching it into your codebase. It supports inline blocking and
> alerting but not Flexresp-style TCP reset session shootdowns.
> Have a look and let me know what features you'd like or bugs you find.
> This code is purely EXPERIMENTAL, this is just me spending some of my
> spare time doing a fun coding project so if your machine sprouts legs
> and refuses to work until it receives part of the TARP bailout it's
> not my fault.
> Here's the link:
> Martin Roesch - Founder/CTO, Sourcefire Inc. - +1-410-290-1616
> Sourcefire - Security for the Real World - http://www.sourcefire.com
> Snort: Open Source IDP - http://www.snort.org
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