As you may notice per our EOL Policy located on the Snort.org website:
https://www.snort.org/eol
Snort 2.9.1.0 has reached it's end of life and Snort 2.9.1.1 will reach it's end of life next week. We'll be removing 2.9.1.0 on Tuesday's release (January 17th) and 2.9.1.1's support will be removed on Thursday (January 19th).
If you are using either one of these versions, we highly recommend that you upgrade to Snort version 2.9.2 which includes some new groundbreaking technology:
http://blog.snort.org/2011/12/snort-292-has-been-released.html
Thank you
