Starts/Stops an SSH Tunnel and SOCKS Proxy on OS X.

tunnel.sh

#!/bin/sh
 
SSH_HOST=user@host            # Change this accordingly. 
SSH_PORT=22                   # If SSH server is listening on different port, change this.
PROXY_INTERFACE="Ethernet"    # Change this to Wi-Fi, if you are on wireless, or to whatever your NIC is.
PROXY_HOST=localhost          # This doesn't change.
PROXY_PORT=8080               # Pick a different port if you like.

if [[ $1 == "start" ]]; then
    ssh -D $PROXY_PORT -f -C -q -N $SSH_HOST -p$SSH_PORT
    sudo networksetup -setsocksfirewallproxy "$PROXY_INTERFACE" $PROXY_HOST $PROXY_PORT
    echo "SSH Tunnel created and SOCKS Proxy Enabled."
    echo "============================================================"
    ps ax | grep $PROXY_PORT | head -n 1
    echo "============================================================"

elif [[ $1 == "stop" ]]; then
    ps aux | grep $SSH_HOST | grep -v grep | awk '{print $2}' | xargs kill -9
    sudo networksetup -setsocksfirewallproxystate "$PROXY_INTERFACE" off
    echo "SSH Tunnel stopped and SOCKS Proxy disabled."


elif [[ $1 == "status" ]]; then
    echo "============================================================"
    echo "Existing Network Services:"
    echo "============================================================"
    networksetup -listallnetworkservices
    echo
    echo "============================================================"
    echo "Current SOCKS Proxy Settings:"
    echo "============================================================"
    networksetup -getsocksfirewallproxy "$PROXY_INTERFACE"
    echo
    echo "============================================================"
    echo "Current SSH Tunnel Process:"
    echo "============================================================"
    process=`ps aux | grep $SSH_HOST | grep -v grep | awk '{print $2}'`
       if [[ $process == "" ]]; then
          echo "SSH Tunnel not started."
       else
           echo ">> [" $process "] <<"
       fi


else
    echo "`basename $0` creates an SSH Tunnel and toggles SOCKS proxy settings on OS X."
    echo
    echo "Usage: "
    echo "  $ sshtunnel start        # Start SSH tunnel and SOCKS proxy."
    echo "  $ sshtunnel stop         # Stops SSH tunnel and SOCKS proxy."
    echo "  $ sshtunnel status       # Prints status information."
    echo
    echo "Proxy Interface:      " $PROXY_INTERFACE
    echo "Proxy Host:           " $PROXY_HOST
    echo "Proxy Port:           " $PROXY_PORT
    echo
    exit 65                     # End process with error to indicate incorrect arguments.
fi