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RESOLVED: Slow Web/Email Performance

Dec. 7, 2012 - As of 9 a.m., the vendor issues which were causing slow performance on some SSL-using services (web and email) seem to be fully resolved.

Recap of event: Early on the morning of Dec. 6, a problem at one of the major commercial providers of Internet trust services (e.g. SSL security certificates) experienced a problem which interfered with their ability to authenticate secure sessions. The vendor resolved the issue within two hours, but Internet service providers, individual services, and individual user machines using cached information continued to see slow performance until they had locally cleared bad cached information, a process which took several hours.

Detailed information on the actual outage and sequence of events is scant, but interested readers might find this brief article useful:

https://isc.sans.edu/diary/Comodo+DNS+hiccup+on+usertrust+com/14653