PIA port forwarding with Linux ifconfig alternatives

port_forward.sh

#! /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 [ "$(uname)" == "Linux" ]; then
    if type ip >/dev/null 2>/dev/null; then
      local_ip=`ip addr show tun0 |  grep "inet " | head -n 1 | sed 's/^ *//g' | cut -d\  -f2 | tee /tmp/vpn_ip`
    elif ifconfig tun0 | grep -oE "inet addr: "; then
      local_ip=`ifconfig tun0 | grep -oE "inet addr: *10\.[0-9]+\.[0-9]+\.[0-9]+" | tr -d "a-z :" | tee /tmp/vpn_ip`
    else
      local_ip=`ifconfig tun0 | grep "inet " | sed 's/^ *//g' | cut -d\  -f2 | tee /tmp/vpn_ip`
    fi
  fi
  if [ "$(uname)" == "Darwin" ]; then
    local_ip=`ifconfig tun0 | grep "inet " | cut -d\  -f2|tee /tmp/vpn_ip`
  fi
  client_id=`cat /tmp/vpn_client_id`
  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

if [ ! -f /tmp/vpn_client_id ]; then
  if [ "$(uname)" == "Linux" ]; then
    echo head -n 100 /dev/urandom | md5sum | tr -d " -" >> /tmp/vpn_client_id
  fi
  if [ "$(uname)" == "Darwin" ]; then
    echo head -n 100 /dev/urandom | md5 -r | tr -d " -" >> /tmp/vpn_client_id
  fi
fi

port_forward_assignment

exit 0

Hi,

My Transmission jail is up and running. My VPN is configured and works with OpenVPN. My firewall is configured with ipfw and works (the connection is stopped if the VPN stops). My only concern now is to port forward a port to Transmission. I'm using FreeNAS 9.10, PIA for VPN and ipfw.

I tried to use the present script (the fork) to port forward a port to Transmission (and to generate the same port each time it is executed). However, I get an error (command not found) when I try to execute the script. I've been reading a lot and I tried to install bash, as you can see per code, but it's already installed. So, I don't know what to try now to get the script working. Could you please help me with this issue?

root@transmission_1:/ # cd /usr/local/etc/openvpn root@transmission_1:/usr/local/etc/openvpn # ls 4b05e93c63684ea1a95518fcfbd8a6a04461b1d5 PIA ca.rsa.2048.crt crl.rsa.2048.pem openvpn.conf openvpn.zip password.txt port_forward.sh port_forward.sh.1 root@transmission_1:/usr/local/etc/openvpn # pkg install bash Updating FreeBSD repository catalogue... FreeBSD repository is up-to-date. All repositories are up-to-date. Checking integrity... done (0 conflicting) The most recent version of packages are already installed root@transmission_1:/usr/local/etc/openvpn # ./port_forward.sh testuname testpas sword ./port_forward.sh: Command not found. root@transmission_1:/usr/local/etc/openvpn #

Thanks a lot!