unable to stop multicast on port 6771

[doal]

My utorrent is multicasting on UDP port 6771 (to IP 239.192.152.143)

even both Peer Exchange and Local Peer Discovery are disabled.

Such activities can compromised usage of utorrent through LAN.

I would like to know:

1. What information and for what purpose is utorrent communicating via UDP 6771

2. How to disable utorrent from doing so (besides block it with firewall)

Thank you

[DreadWingKnight]

UDP 6771 is only used for the multicast search for local peers. Peer exchange occurs over already-established connections.

Did you disable local peer discovery globally or on a per-torrent basis?

[Switeck]

I doubt that they're the cause...but did you try disabling the 2 UPnP features in uTorrent?

[doal]

Oh~ I got it

The change in Preferences only affect new tasks

That's the existing tasks cause me tourble on a per-torrent basis settings

Thanks DreadWingKnight

[Firon]

Disabling LDP in the preferences will disable it globally.

[Ultima]

Nah, LPD isn't a global "service" like DHT is -- it behaves more like PEX in that it's specific to each torrent only. As such, the option in the preferences doesn't affect torrents retroactively -- it affects newly added torrents only.

[Firon]

Hum, you're right. I was mistaken. >_>