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+--- Thread: cdn proxies not being filtered properly? (/Thread-cdn-proxies-not-being-filtered-properly)
cdn proxies not being filtered properly? - googlealchemist - 03-19-2011
After grabbing a bunch of new proxies I always check them b4 using of course to make sure they are
-valid
- 2k or less time
- cdn free
- Ok in G
At least I thought it was filtering out cdn proxies...but when checking pr i see it popping up randomly how is this possible?
RE: cdn proxies not being filtered properly? - s4nt0s - 03-21-2011
Unfortunately, I have no clue what a cdn proxy is .. maybe someone with more knowledge can chime in.
RE: cdn proxies not being filtered properly? - Refresh - 03-22-2011
Courtesy of wikipedia
"CoDeeN is a proxy server system created at Princeton University and deployed for general use on PlanetLab. It operates as per the following:
Users set their internet caches to a nearby high bandwidth proxy that participates in the system.
Requests to that proxy are then forwarded to an appropriate member of the system that is in charge of the file (should be caching it) and that has sent recent updates showing that it is still alive. The file is forwarded to the proxy and thence to the client.
What this means for normal users is that if you use this and a server is slow, however the content is cached on the system, then (after the first upload) requests to that file will be fast. It also means that the request will not be satisfied by the original server, equivalent to free bandwidth.
For rare files this system could be slightly slower than downloading the file itself. Especially for non-cacheable content, you may as well go to the origin host. The system's speed is also subject to the constraint of number of participating proxies.
For the case of large files requested by many peers, it uses a kind of 'multi-cast stream' from one peer to the others, which then distribute out to their respective proxies.
CoBlitz is a take-off of this, in that files are not saved in the cache of a single member of the proxy-system, but are instead saved piece-wise across several members, and 'gathered up' when they are requested. This allows for more sharing of disk space among proxies, and for higher fault tolerance. To access this system, url's are prefixed with http://coblitz.codeen.org/"
RE: cdn proxies not being filtered properly? - googlealchemist - 03-22-2011
hi guys,thanks for the response, and im not trying to be a prick. but as posted i know what they are thats not the issue. im asking why they get past the filter when im checking proxies before using them in box. ie i run a new batch of prox thru the sbox checker and keep the ones that pass.
but then when using those prox to check pr i occasionally get a url that says 'cdn' next to it. how is this possible as wasnt it supposed to filter all of them out in my check?
thanks