A Content Distribution Network for PlanetLab
CoDeeN is an
academic testbed Content Distribution Network (CDN) built on
top of PlanetLab by
the Network Systems
Group at Princeton University. This testbed CDN consists
of a network of high-performance proxy servers. Currently,
proxy servers have been deployed on many
PlanetLab nodes. These proxy servers behave both as
request redirectors and server surrogates. They
cooperate with each other and collectively provide a fast and robust web content delivery
service to CoDeeN
A number of projects are related to CoDeeN, including the following:
CoDeeN follows an opt-in model: to take advantage of CoDeeN's service, you need to make a small change to your browser's proxy configuration. Here are the steps for two common browsers.
[Disclaimer:] CoDeeN is still under development, and while we are striving to provide continual service, it may not always be as smooth as we would like. If you are interested in using CoDeeN, please bear with us when problems arise, and feel free to provide us with feedback on your experiences.
Before taking the following steps, you need to first pick a proxy server near you from this list and denote it as your-nearby-proxy. For example, Princeton users may choose planetlab-1.cs.princeton.edu. Note: some PlanetLab sites are currently filtering port 3128, so if that port does not work, you should pick a different node or try ports 3127 or 3124.
|Browser||Internet Explorer||Netscape Navigator|
You can get a list of current CoDeeN proxy servers and their status
through this link:
CoDeeN proxies on PlanetLab
All CoDeeN publications can be found at the Network Systems Group's publication page
CoDeeN intro presented at the August 2003 MIT IRIS/PlanetLab meeting. Also in powerpoint format.
CoDNS presented at the October 2003 RPI PlanetLab meeting. Also in powerpoint format.
CoDeploy presented at the March 2004 HP Palo Alto PlanetLab meeting. Also in powerpoint format.
DARPA FTN meeting, Jan 2003 poster
CoDeeN runs on the PlanetLab global network testbed. PlanetLab has been supported in part by the National Science Foundation* (under grants 0101247, 0454278, 0335214) and by DARPA (under contract N66001-05-1-8902). Support is also provided by companies that join the PlanetLab Consortium.
*Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.
All accesses via CoDeeN are logged,
mostly to aid in identifying abuse and other forms of damage
control. We sometimes monitor these logs, report abuse, and release
entries to aid in investigations. In case of suspicious traffic, we
may access URLs from the logs to determine what kind of content is
passing through our network. We are also using these logs in our own
research, so they may be examined as needed for non-abuse reasons. For
normal users, we do not expect that we will intentionally release any
personally-identifying information. To prevent abuse, some sites have
requested we pass along the client IP addresses, and these are
included with every request forwarded to those sites.
We receive many queries about whether CoDeeN is an open proxy, and whether it is safe for
the hosting institutions. CoDeeN uses
semi-restricted proxies, with a number of protections against the
abuse normally encountered by open proxies. Some of these are
We receive many queries about whether CoDeeN is an open proxy, and whether it is safe for the hosting institutions. CoDeeN uses semi-restricted proxies, with a number of protections against the abuse normally encountered by open proxies. Some of these are described below: