Recentemente estou tendo problemas estranhos com torrents na minha conexão da GVT. Se eu tento baixar um torrent do The Pirate Bay, como por exemplo este, eu vejo o seguinte erro:

ERROR:
[00:10:23] bad data from tracker - invalid peer list

Mas se eu testar isso a partir de outras redes, ou usar Tor para conectar ao tracker, tudo funciona como deveria. Alguém mais usando GVT com esse problema?

Investigando mais, consegui notar que a resposta recebida quando tento contactar o tracker é totalmente truncada:

Fora da rede da GVT (ou usando Tor, o resultado é o mesmo):

$ curl -4 -v 'http://vip.tracker.thepiratebay.org:80/announce?info_hash=Q%F7%9F%1D%9F%82%7C%CFO%3D%FB%EC%C0%2B%96F%EC%3D%CF%EB&peer_id=-lt0C40-%FBIg%EB%D3%FD%BFF%026%D68&key=7f3ccebc&compact=1&port=23541&uploaded=0&downloaded=0&left=842513832&event=started' | hexdump -C
* About to connect() to vip.tracker.thepiratebay.org port 80
*   Trying 91.191.138.3... connected
* Connected to vip.tracker.thepiratebay.org (91.191.138.3) port 80
> GET /announce?info_hash=Q%F7%9F%1D%9F%82%7C%CFO%3D%FB%EC%C0%2B%96F%EC%3D%CF%EB&peer_id=-lt0C40-%FBIg%EB%D3%FD%BFF%026%D68&key=7f3ccebc&compact=1&port=23541&uploaded=0&downloaded=0&left=842513832&event=started HTTP/1.1
> User-Agent: curl/7.15.5 (x86_64-pc-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8c zlib/1.2.3 libidn/0.6.5
> Host: vip.tracker.thepiratebay.org
> Accept: */*
>
< HTTP/1.0 200 OK
< Content-Type: text/plain
< Content-Length: 399
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   399  100   399    0     0   1169      0 --:--:-- --:--:-- --:--:--     0Closing connection #0

00000000  64 38 3a 63 6f 6d 70 6c  65 74 65 69 34 38 65 31  |d8:completei48e1|
00000010  30 3a 64 6f 77 6e 6c 6f  61 64 65 64 69 33 31 37  |0:downloadedi317|
00000020  37 65 31 30 3a 69 6e 63  6f 6d 70 6c 65 74 65 69  |7e10:incompletei|
00000030  34 39 65 38 3a 69 6e 74  65 72 76 61 6c 69 31 38  |49e8:intervali18|
00000040  30 39 65 31 32 3a 6d 69  6e 20 69 6e 74 65 72 76  |09e12:min interv|
00000050  61 6c 69 39 30 34 65 35  3a 70 65 65 72 73 33 30  |ali904e5:peers30|
00000060  30 3a 45 b4 0e c2 f7 70  46 69 89 40 25 e3 47 6e  |0:E....pFi.@%.Gn|
[...]
00000180  80 2c c1 1b 55 16 7f ca  c9 0d 07 6d e8 f4 65     |.,..U......m..e|
0000018f

E usando a conexão da GVT:

$ curl -4 -v 'http://vip.tracker.thepiratebay.org:80/announce?info_hash=Q%F7%9F%1D%9F%82%7C%CFO%3D%FB%EC%C0%2B%96F%EC%3D%CF%EB&peer_id=-lt0C40-%FBIg%EB%D3%FD%BFF%026%D68&key=7f3ccebc&compact=1&port=23541&uploaded=0&downloaded=0&left=842513832&event=started' | hexdump -C
* About to connect() to vip.tracker.thepiratebay.org port 80 (#0)
*   Trying 91.191.138.5... connected
* Connected to vip.tracker.thepiratebay.org (91.191.138.5) port 80 (#0)
> GET /announce?info_hash=Q%F7%9F%1D%9F%82%7C%CFO%3D%FB%EC%C0%2B%96F%EC%3D%CF%EB&peer_id=-lt0C40-%FBIg%EB%D3%FD%BFF%026%D68&key=7f3ccebc&compact=1&port=23541&uploaded=0&downloaded=0&left=842513832&event=started HTTP/1.1
> User-Agent: curl/7.19.4 (i386-redhat-linux-gnu) libcurl/7.19.4 NSS/3.12.2.0 zlib/1.2.3 libidn/0.6.14 libssh2/0.18
> Host: vip.tracker.thepiratebay.org
> Accept: */*
>
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0< HTTP/1.1 200 OK
< Content-Length: 43
<
{ [data not shown]
  0    43    0    43    0     0    138      0 --:--:-- --:--:-- --:--:--  1162* Connection #0 to host vip.tracker.thepiratebay.org left intact

* Closing connection #0
00000000  64 38 3a 69 6e 74 65 72  76 61 6c 69 36 30 65 35  |d8:intervali60e5|
00000010  3a 70 65 65 72 73 36 3a  bd 72 e5 8d 41 f2 37 3a  |:peers6:.r..A.7:|
00000020  70 72 69 76 61 74 65 69  31 65 65                 |privatei1ee|
0000002b