Re: Comcast is using Sandvine to manage P2P Connections

Re: Comcast is using Sandvine to manage P2P Connections
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funchords @ 21st Aug 02:38PM:
Re: Comcast is using Sandvine to manage P2P Connections

It's been over 3 months since my original post, so I decided to see if the numbers or behaviors had changed.

The numbers did not change, much. In May, 39% of my BitTorrent connections were killed by the RST flag, but I was still able to seed a torrent at my preferred speed (16 KB/s). Today that number is 46% killed, and still able to seed a torrent at my preset upload limit speed (16 KB/s).

What did change is the behavior toward BitTorrent's standard DHE encrypted connections: Surprisingly, none were dropped! It was only yesterday or the day before that I noted encrypted connections were still being killed by RST, so this is new behavior for me. This could be due to policy parameters such as time-of-day, level of global or individual use, or localized adjustments -- so your milage may vary.

The test method:
1. Start a BitTorrent client performing an upload (seeding) to an established swarm.
2. Wait 5 minutes to allow connections and speeds to stabilize.
3. Record the starting number of connections and resets reported by "netstat -s" or start the batch file (see »How to test how many connections are being reset by RST pack for details).
4. Wait 5 minutes.
5. Record the ending number of connections and resets, and determine the amount that took place during the test (or obtain the numbers from the batch file).

I used the above method on the same small (25-30 peer, 4 seed) swarm, using uTorrent 1.7.2.

No encryption ...                      34 out of 73 reset (46%)
Encryption enabled (with fallback) ...  5 out of 20 reset (25%)
Encryption forced (no fallback) ...     0 out of 17 reset ( 0%)

anon @ 29th Aug 04:31PM:
Re: Comcast is using Sandvine to manage P2P Connections

Forced encryption is not working at all for me. (Then again, I'm initially-seeding at best possible upload speed.)
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macguy @ 30th Aug 12:54AM:
Re: Comcast is using Sandvine to manage P2P Connections

Forced encryption isn't working here either. I can connect for a maybe a minute or two and then the peer disconnects from me.

Oh well.
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Grethor @ 19th Oct 02:30PM:
Re: Comcast is using Sandvine to manage P2P Connections

I will try this. Thanks.
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