"Pudel-drawing" by Gustav Mützel (Brehms Tierleben), public domain

Protecting users against POODLE by removing SSL 3.0 support

To protect our users against the recently disclosed POODLE security vulnerability, we are removing support for SSL 3.0 on all Wikimedia sites as of 15:00 UTC (8:00 am PDT) today.

SSL 3.0 is an outdated implementation of the HTTPS web encryption protocol. […]


Wikimedia Foundation selects CyrusOne in Dallas as new data center

In October 2013, we launched a public request for proposals regarding a new data center location in the continental US for co-locating Wikimedia infrastructure. We’ve now concluded this process and selected the CyrusOne facility in Dallas/Carrollton. Wikimedia’s primary data center is in Ashburn, Virginia, and we’ve been preparing to end…


Thumbnail issues being resolved

Last Monday, our Solaris server that contains all image thumbnails developed problems. It ran out of memory, became too slow and eventually even started to crash. (For the technically inclined: we think the kernel is leaking some file system structure in kernel memory.) This caused missing thumbnails across Wikimedia projects….


Wikimedia projects down due to power problem in primary data center

Starting at 0:10 UTC on July 5th, the Wikimedia Foundation suffered from intermittent, partial power failures in the internal power network of one of its main data centers in Tampa, Florida. Due to the temporary unavailability of several critical systems and the large impact on the available systems capacity, all…


Global Outage (cooling failure and DNS)

Due to an overheating problem in our European data center many of our servers turned off to protect themselves. As this impacted all Wikipedia and other projects access from European users, we were forced to move all user traffic to our Florida cluster, for which we have a standard quick…