Another Denial-of-Service Attack Takes Down Twitter

Already a victim last Thursday of a denial-of-service attack that left the site dark for more than three hours, Twitter on Tuesday morning experienced another 27 minutes of downtime that the company blamed on an attack of unknown origin.

According to Network World, Twitter also had minor outages Sunday and yesterday. Last week's attack, which was also felt by users of Facebook and LiveJournal, was attributed by a Facebook executive to efforts to silence a Georgian blogger.

These recent attacks may not impact the enterprise or most organizations that already block access to social networking sites, but they are a good reminder to make sure the systems in your network aren't contributing to the botnet army by ensuring that these systems aren't infected by drive-by malware or other viruses on websites that your end-users visit. Keep that forward proxy's URL database and malware scanner up to date.