University IT (UIT) maintains mirrors of the main Debian and Ubuntu package repositories here at Stanford. These repositories are stored on a server with a large NFS volume. We update the mirror three times per day, or every eight hours.
Here are the endpoints:
We mirror the current stable, the previous stable, as well as experimental, sid, and testing distributions.
For more on how Debian repositories work, see Debian Repository Format.
We also mirror several Ubuntu distributions, including the current LTS (Long Term Support) distribution.