For those of you who, like me, are fans of the various challenges, the Honeynet Project has released challenge 4 in their 2010 forensics series.

To quote from the challenge page: Challenge 4 - VoIP ... takes you into the world of voice communications on the Internet. VoIP with SIP is becoming the de-facto standard for voice communication on the Internet. As this technology becomes more common, malicious parties have more opportunities and stronger motives to take control of these systems to conduct nefarious activities. This Challenge is designed to examine and explore some of attributes of the SIP and RTP protocols. Enjoy the challenge."

Have fun!

-- Rick Wanner - rwanner at isc dot sans dot org