There are the Emerging Threats.net Open rulesets.

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Icon  Name                                                                   Last modified      Size  Description
[DIR] blockrules/ 2018-02-22 00:30 - [DIR] changelogs/ 2018-02-22 17:05 - [DIR] fwrules/ 2014-08-11 13:22 - [DIR] open-nogpl/ 2018-02-22 17:06 - [DIR] open/ 2018-02-22 17:06 - [DIR] projects/ 2011-01-17 13:34 - [DIR] research/ 2016-02-12 13:55 - [DIR] sidmap/ 2012-07-12 12:18 - [TXT] version.txt 2018-02-22 17:05 5 [TXT] OPEN_download_instructions.html 2018-01-04 18:06 3.8K OPEN Download Instructions [TXT] PRO_download_instructions.html 2018-01-19 15:42 4.4K PRO Download Instructions
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