Proxying Bittorrent

[Michael Baudino]

Igor Sysoev wrote:
> On Tue, Sep 22, 2009 at 07:57:31PM +0200, Michael Baudino wrote:
> 
>> Hello,
>>
>> I'm trying to proxy BitTorrent tracker traffic through nginx (0.6.32)
>> using the following configuration :
>>                                  __________
>> +--------+    +-----------+     (          )     +------------+
>> | BT Box |----| Nginx Box |----(  Internet  )----| BT tracker |
>> +--------+    +-----------+     (__________)     +------------+
>>
>>
>> My BitTorrent Box can access all other peers, but that's not the point here.
>>
>> The point here is to proxy traffic from the BT Box to the tracker (which
>> is HTTP :
>> http://wiki.theory.org/BitTorrentSpecification#Tracker_HTTP.2FHTTPS_Protocol).
>>
>> I'm using the /etc/hosts file on the BT Box to override
>> tracker.openbittorrent.com name resolution and make it resolve to
>> 10.73.0.14 (the Nginx Box address).
>>
>> BT Box only receives 502 Bad Gateway responses from the Nginx Box with
>> the following config :
>>
>> server {
>>         listen 10.73.0.14:80;
>>         server_name  tracker.openbittorrent.com;
>>
>>         access_log  /var/log/nginx/bt_access.log main;
>>         error_log   /var/log/nginx/bt_error.log debug;
>>
>>         location / {
>>                 proxy_set_header  X-Real-IP  $remote_addr;
>>                 proxy_pass      http://$host$request_uri;
>>         }
>> }
>>
>>
>> While it's receiving a good 200 response if I use one of the IP
>> addresses of the tracker instead of $host :
>>
>>                 proxy_pass      http://188.126.64.3$request_uri;
>>
>>
>> I could just go for it but the problems are :
>> - it does not use the tracker's DNS load-balancing system
>> - i cannot include other trackers in the server_name directive
>>
>> So here is my question (finally !) :
>> - is it normal that proxy_pass'ing to $host returns a 502 Bad Gateway ?
>> - is there any other way to do what i want ?
> 
> If you look in error_log for 502 reason, you will
> "... no resolver defined to resolve tracker.openbittorrent.com ..."
> You need to set up localhost named or use any existant one:
> 
> http {
>      resolver  127.0.0.1;
> 


It's working great !
Thanks a lot, Igor.

-- 
Mike
KameHouse Prod.