Set up an SSH SOCKS proxy from the command line.

proxy

#!/bin/bash
## (C) George Goulas, 2011
##
## Proxy service configuration script for OSX
##

## SETTINGS
##
# SOCKS PROXY PORT
PORT=8080

# SSH OPTIONS TO CREATE PROXY
SSH_OPTS="-C2qTnNfD"

# user@host
SSH_HOST="[email protected]"

# SSH PORT
SSH_PORT=22

# OSX network service to configure proxy for
NET_SERVICE="Ethernet"  # or "Wi-Fi". use "networksetup -listallnetworkservices" to see available services 

# Verbose, if not empty, it prints diagnosing messages
VERBOSE=1
##
## END OF SETTINGS, DO NOT MODIFY PAST THIS POINT
##

SSH_CMD="ssh ${SSH_OPTS} ${PORT} -p ${SSH_PORT} ${SSH_HOST}"

function report {
  MSG=$1
	if [ -n "${VERBOSE}" ]; then
		echo $MSG
	fi
}

function enableProxy {
	networksetup  -setsocksfirewallproxy ${NET_SERVICE} localhost ${PORT}
	networksetup  -setsocksfirewallproxystate ${NET_SERVICE} on
	${SSH_CMD}
}

function disableProxy {
	ps -ax | grep "${SSH_CMD}" | grep -v grep | awk '{print $1}'| xargs kill
	networksetup  -setsocksfirewallproxystate ${NET_SERVICE} off
}

function showStatus {
	ps -ax | grep "${SSH_CMD}" | grep -v grep > /dev/null
	if [ $? -eq 0 ]; then
		echo SSH SOCKS Proxy status: ON
	else
		echo SSH SOCKS Proxy status: OFF
	fi
	networksetup -getsocksfirewallproxy ${NET_SERVICE} | grep Enabled | grep Yes > /dev/null
	if [ $? -eq 0 ]; then
		echo Proxy setting in network setup for ${NET_SERVICE}: ON
	else
		echo Proxy setting in network setup for ${NET_SERVICE}: OFF
	fi
}

case "$1" in

	on)	report "Enabling Proxy"
		enableProxy
		;;

	off)	report "Disabling Proxy"
		disableProxy
		;;

	status) echo status
		showStatus
		;;
	*) echo Options: on to enable proxy, off to disable, status to see status.
esac