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Anatomy of a Denial of Service Attack
Running one of the largest websites on the internet with about 5 million unique sites hosted exposes you to all sorts of issues. There are constant events to deal with, some internal, some external. This morning, one of the more common external events, a Distributed Denial of Service Attack occurred. We experience these types of…
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NYC at Night photoblog
Since we launched the Monotone theme on WordPress.com, I have been posting photos of New York City at NYC at Night. My goal is to post 1 a week, but I don’t know if that will happen. Enjoy!
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mod_auth_mysql and phpass
With the release of WordPress 2.5, there were some significant changes to the way passwords were stored in the database. Prior to 2.5, passwords were stored as MD5 hashes. While simple and easy, there were some security implications, so since 2.5, passwords are now salted and hashed using the phpass encryption library. At Automattic we…
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Load Balancer Update
A while back, I posted about some testing we were doing of various software load balancers for WordPress.com. We chose to use Pound and have been using it past 2-ish years. We started to run into some issues, however, so we starting looking elsewhere. Some of these problems were: Lack of true configuration reload support…
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Amazon AWS Outage
Looks like quite a few (if not all) of the Amazon AWS services are down or performance is significantly degraded this morning. This is the first significant outage since we started using S3 to serve images for WordPress.com. Currently we serve about 1500 image requests per second across WordPress.com. About 80-100 per second are served…
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