As reported in a diary yesterday, the Skype VoIP service has been down for well over a day.  Many of our readers report that they still can't get their clients to connect, while others say it's working fine.  According to Skype, all is well and everybody should be happy.

So what is really going on?  Was it just a "software problem" as Skype says?  Here are some ideas to consider:

• Was the Skype outage caused by the publication of a Skype DoS exploit?
• Was it caused by the mandatory reboot after Microsoft's Patch Tuesday?

Both theories are referenced at http://colsec.blogspot.com/2007/08/skype-outage-last-24-hours.html

Unless something "new" comes up, we ask that you keep an eye on Skype's heartbeat blog for further unfolding details.  (Thanks, Roland, for the links!)

UPDATE:
Ronaldo reminded us of the Snort Skype Preprocessor  posted a few days ago.  A preprocessor that detects/blocks Skype....hmmm....

Marcus H. Sachs
Director, SANS Internet Storm Center