Simple ssh tunnel script. Tunnels all network traffic over ssh through desired server.

sshtunnel.plugin.zsh

#! /bin/sh

# used with oh-my-zsh and placed in ~ZSH_CUSTOM/plugins/sshtunnel/sshtunnel.plugin.zsh
# must be enabled in .zshrc plugins e.g. plugins=(sshtunnel)
#
# both PORT and LOCAL_PORT must be replaced with desired values
# if tunneling over Wi-Fi needed, uncomment the 3 relevant lines
#
# oh, and closing the tunnel will kill all ssh processes

function _ssh_tunnel_help {
  echo "usage: sshtunnel <command>\n"
  echo "   open      Opens ssh tunnel to server and enables SOCKS proxy"
  echo "   close     Closes ssh tunnel and disables SOCKS proxy"
  echo "   help      Displays this message\n"
}
function sshtunnel {
if [ $1 ]
then
  case "$1" in
  open)
    sudo -v
    echo "enabling SOCKS proxy..."
    # sudo networksetup -setsocksfirewallproxy Wi-Fi 127.0.0.1 LOCAL_PORT
    sudo networksetup -setsocksfirewallproxy Ethernet 127.0.0.1 LOCAL_PORT
    # sudo networksetup -setsocksfirewallproxystate Wi-Fi on
    sudo networksetup -setsocksfirewallproxystate Ethernet on
    echo "tunneling..."
    ssh -f -D LOCAL_PORT -C -N user@server -p PORT
    echo "tunnel opened."
  ;;
  close)
    sudo -v
    echo "killing ssh processes..."
    pkill ssh
    pkill ssh-agent
    echo "disabling SOCKS proxy..."
    # sudo networksetup -setsocksfirewallproxystate Wi-Fi off
    sudo networksetup -setsocksfirewallproxystate Ethernet off
    echo "tunnel closed."
  ;;
  *)
    _ssh_tunnel_help
  ;;
  esac
else
  _ssh_tunnel_help
fi
}