Security Onion Searching DNS Traffic using Bro and ELSA

https://github.com/search?utf8=%E2%9C%93&q=ELSA

https://www.youtube.com/watch?v=33HZyIxbg6c

https://www.youtube.com/watch?v=mazSRVFYmLQ

http://opensecgeek.blogspot.com/2013/02/nsm-with-bro-ids-part-4-bro-and-elsa.html