On Tuesday, July 8, 2008, CERT released a Security Alert regarding multiple DNS implementations that are vulnerable to cache poisoning (see http://www.us-cert.gov/cas/techalerts/TA08-190B.html for details). This coincides with a massive multi-vendor patch release to resolve the issue. Because of the severity of the issue, TSO has scheduled emergency maintenance for 10:00 AM on Friday, July 11, to patch the DNS server arcturus.cc.gatech.edu. This patching is expected to be completed by 1:00 PM on July 10. Users should not be affected during this maintenance period.