Transmission thru OpenVPN - portforwarding, how?

[unca_NAS]

Hello
Have transmission running in jail. In the same jail is OpenVPN running. Transmissions traffic goes thru VPN.

Port-forwarding port 51413 was easy task when TransM was running without VPN. Im pretty sure that it can be done - but how?

EDIT:

After some googling bumped into a VPN-providers (Private Internet Access) script for linux, thats suppose to solve the problem. Is it possible to modify the script in a way that it can be run within a plugin jail?

Played a little with it (if-statement commented) results "Loading port forward assignment information..." than terminates without returning the port number..

Code:

#! /bin/bash
#
# Enable port forwarding
#
# Requirements:
# your Private Internet Access user and password as arguments
#
# Usage:
# ./port_forward.sh <user> <password>

error( )
{
echo "$@" 1>&2
exit 1
}

error_and_usage( )
{
echo "$@" 1>&2
usage_and_exit 1
}

usage( )
{
echo "Usage: `dirname $0`/$PROGRAM <user> <password>"
}

usage_and_exit( )
{
usage
exit $1
}

version( )
{
echo "$PROGRAM version $VERSION"
}


port_forward_assignment( )
{
echo 'Loading port forward assignment information..'
# if [ "$(uname)" == "Linux" ]; then
#local_ip=`ifconfig tun0|grep -oE "inet addr: *10\.[0-9]+\.[0-9]+\.[0-9]+"|tr -d "a-z :"|tee /tmp/vpn_ip`
#client_id=`head -n 100 /dev/urandom | md5sum | tr -d " -"`
#fi
#if [ "$(uname)" == "Darwin" ]; then
local_ip=`ifconfig tun0 | grep "inet " | cut -d\ -f2|tee /tmp/vpn_ip`
client_id=`head -n 100 /dev/urandom | md5 -r | tr -d " -"`
#fi
json=`wget -q --post-data="user=$USER&pass=$PASSWORD&client_id=$client_id&local_ip=$local_ip" -O - 'https://www.privateinternetaccess.com/vpninfo/port_forward_assignment' | head -1`
echo $json
}

EXITCODE=0
PROGRAM=`basename $0`
VERSION=1.0
USER=$1
PASSWORD=$2

while test $# -lt 2
do
case $1 in
--usage | --help | -h )
usage_and_exit 0
;;
--version | -v )
version
exit 0
;;
*)
error_and_usage "Unrecognized option: $1"
;;
esac
shift
done

port_forward_assignment

exit 0

 

[dlavigne]

Were you able to figure this out?

 

[unca_NAS]

Couldnt find a solution so I'll be changing the vpn-provider.