Synology NAS

Here are the steps to run it on a Synology NAS (Tested on DSM 6) :

  • Connect as admin to your Synology SSH
  • Switch to root with command sudo su -
  • Enter your admin password when prompted
  • Create a file anywhere in your synology file system by typing vim /volume1/foldername/ replacing foldername with any folder you created on your Synology. You will also need to replace foldername for the commands in the remainder of this guide.
  • Paste @timkelty 's script :

# Create the necessary file structure for /dev/net/tun
if ( [ ! -c /dev/net/tun ] ); then
  if ( [ ! -d /dev/net ] ); then
    mkdir -m 755 /dev/net
  mknod /dev/net/tun c 10 200
  chmod 0755 /dev/net/tun

# Load the tun module if not already loaded
if ( !(lsmod | grep -q "^tun\s") ); then
  insmod /lib/modules/tun.ko
  • Save the file with [escape] + :wq!
  • Go in the folder containing your script : cd /volume1/foldername/
  • Check permission with chmod 0755
  • Run it with ./
  • Return to initial directory typing cd
  • Create the DNS config file by typing vim /volume1/foldername/resolv.conf
  • Paste the following lines :
  • Save the file with [escape] + :wq!
  • Create your Docker container with the following command. Note the following things you should change or may want to consider changing:
  • If you'd like any Transmission options (for instance, stop seeding once a certain ratio has been reached) to persist across container restarts, now is the time to enter them by modifying the command below. See here for details.
  • You must change the folder paths for the paths listed in the following command.
  • You must also specify the UID and GID of the user Transmission should run. The placeholder provided below almost certainly will not work on your system without modification.
# Tested on DSM 6.1.4-15217 Update 1, Docker Package 17.05.0-0349
docker run \
    --cap-add=NET_ADMIN \
    --device=/dev/net/tun \
    -d \
    -v /volume1/foldername/resolv.conf:/etc/resolv.conf \
    -v /volume1/yourpath/:/data \
    -e "OPENVPN_CONFIG=CA\ Toronto" \
    -e "LOCAL_NETWORK=" \
    -e "OPENVPN_OPTS=--inactive 3600 --ping 10 --ping-exit 60" \
    -e "PGID=100" \
    -e "PUID=1234" \
    -p 9091:9091 \
    --sysctl net.ipv6.conf.all.disable_ipv6=0 \
    --name "transmission-openvpn-syno" \
  • To make it work after a nas restart, create an automated task in your synology web interface : go to Settings Panel > Task Scheduler create a new task that run /volume1/foldername/ as root (select 'root' in 'user' selectbox). This task will start module that permit the container to run, you can make a task that run on startup. These kind of task doesn't work on my nas so I just made a task that run every minute.
  • Enjoy