Simple script to connect to a dynamic proxy via SSH and connect your local OS X wifi to it via SOCKS. Disconnects on CTRL+C

socks-proxy.sh

#!/bin/bash

# Set PROXY_HOST to the SSH proxy hostname (optionally, include a username)
# Override PROXY_PORT if necessary

sudo -s <<EOF
trap clear_proxy INT

function clear_proxy() {
  echo "Disconnecting proxy..."
  networksetup -setsocksfirewallproxystate "Wi-Fi" off
}

echo "Setting proxy to localhost:${PROXY_PORT:=6000}"
networksetup -setsocksfirewallproxy "Wi-Fi" localhost $PROXY_PORT
echo "Connecting to $PROXY_HOST dynamic proxy via SSH"
ssh -D $PROXY_PORT -N $PROXY_HOST
EOF