Gluetun Transmission Port Manager

Automatically updates the listening peer-port for Transmission to the port forwarded by Gluetun.

Description

This has been forked from gluetun-qbittorrent-port-manager and modified for the Transmission BitTorrent client.

Gluetun has the ability to forward dynamically assigned ports from VPN providers, but Transmission is not aware when a port change occurs. This script uses the Gluetun control server to check the assigned port forward. If the forwarded port does not match with the Transmission peer-port, the peer-port will be updated in Transmission.

Requirements

Requirements for Transmission:

• Valid username and password for rpc authentication.
• Disable: Randomize port on launch (peer-port-random-on-start).
• Disable: Use port forwarding from my router (port-forwarding-enabled).

Requirements for Gluetun:

• Valid username and password for control server authentication.
• Control server port exposed in Docker (default: 8000).

Example for docker-compose

Below an example for a docker-compose.yml configuration:

gluetun-transmission-port-manager:
  image: twxd/gluetun-transmission-port-manager:latest
  environment:
    GLUETUN_HOST: localhost        # Optional (default: localhost)
    GLUETUN_PORT: 8000             # Optional (default: 8000)
    GLUETUN_USERNAME: admin        # Required
    GLUETUN_PASSWORD: secret       # Required
    TRANSMISSION_HOST: localhost   # Optional (default: localhost)
    TRANSMISSION_PORT: 9091        # Optional (default: 9091)
    TRANSMISSION_USERNAME: admin   # Required
    TRANSMISSION_PASSWORD: secret  # Required
    PORT_CHECK_INTERVAL: 60        # Optional (default: 60 seconds)
  network_mode: service:gluetun
  depends_on:
    - gluetun
    - transmission
  restart: unless-stopped