Debian Mirrors
The local mirror is: http://mirror.dc15.debconf.org/
The other nearby Debian Archive mirrors are:
- Secondary-push mirror http://mirror.de.leaseweb.net/debian/ in Frankfurt should be only 5ms from uni-heidelberg.de (10Gbit/s)
- Leaf mirror http://ftp.fau.de/debian/ (in Essingen) should be only 5ms from uni-heidelberg.de (20Gbit/s) - also supports HTTPS!
- Leaf mirror http://debian.netcologne.de/debian/ (in Koeln, peering at DE-CIX Frankfurt) should be only 5ms from uni-heidelberg.de (4Gbit/s)
- … or simply use http://httpredir.debian.org/debian/ - the world's local mirror!
(All of these support IPv6.)
 Rented data-centre units
Hetzner's Falkenstein datacenterpark should be only 6ms from uni-heidelberg.de. From http://www.serverbidding.com/ one can rent a dedicated server for as little as 30 days, booting into a Debian live system. An Intel Core i7-3770 with 32GiB ram, 2x 3TiB disks and 1Gbit/s connection is only about €35 - handy for teams to share in case your laptops are not powerful enough for package building or virtualisation tasks you might like to do at DebCamp/Conf.