How to use only 1 port for torrent outbound ?

Discussion in 'Tomato Firmware' started by kesdonck, Jun 22, 2007.

  1. kesdonck

    kesdonck LI Guru Member

    Hi all,

    Here is my problem:
    I'm under osX and use Transmission to download torrents (Transmission is set on the 9500 port).
    I've forwarded the 9500 port to my ip adress ( As you can see on the picture, a lot of outbound connections use differents ports of my OSX machine. How to limit outbound connections to use only one port ?

    Attached Files:

  2. GeeTek

    GeeTek Guest

    Torrents use multiple ports by default. Port 9500 is only for tracker info, but torrent will still use a new port for each new connection. The speed can still be effectively controlled with Tomato, but you need to set up rules for the torrent traffic and for port ranges.
  3. tomatouser

    tomatouser LI Guru Member

    EDIT : I think i have found how to do it in Utorrent
    just click on options >> Preferences >> advanced and set net.outgoin_port to whichever value u like
  4. kesdonck

    kesdonck LI Guru Member

    Ok, now i understand why are there so many outgoing connections.:)
    I'll set up my default class to low for torrents to not apply any P2P filter as I can't choose which port range to use in Transmission.

    Set my 80/443 DST port to high, 53 to highest.

  5. Hypernova

    Hypernova LI Guru Member

    Wouldn't limiting the UL flat out also affect the DL speed since ACK packets would also be affected? eg set it to 1K while it would show up as 1K in utorrent it would also cripple the DL.
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