MacOS SOCKS tunnel

tunnel

#!/bin/bash
# SOCKS proxy via ssh tunnel for MacOS
# Install to /usr/local/bin/tunnel with:
# curl https://gist.githubusercontent.com/benfasoli/543c14c90a4909e0305180bd8423969e/raw/ > /usr/local/bin/tunnel && chmod +x /usr/local/bin/tunnel

TARGET=$1
if [ -z "$TARGET" ]; then
    echo -n "SSH target (e.g. [email protected]): "
    read TARGET
fi

DEFAULT_PORT=8080
echo "Enter local port for outgoing connections"
echo "Leave this as is unless you have a need to change it"
echo "System ports (e.g. 80) requires running this script with the sudo command"
echo -n "Local proxy port [$DEFAULT_PORT]: "
read PORT
PORT=${PORT:-$DEFAULT_PORT}

echo "Opening a SOCKS tunnel to: $TARGET"
echo "Tunnel will be enabled after server password is entered..."
echo
echo "To end proxy session, ctrl-C to stop this script"
echo

function enable_proxy() {
    networksetup -setsocksfirewallproxy Wi-Fi 0.0.0.0 $PORT
}

function disable_proxy() {
    networksetup -setsocksfirewallproxy Wi-Fi "" ""
    networksetup -setsocksfirewallproxystate Wi-Fi off
}

trap disable_proxy EXIT
enable_proxy

ssh -D *:$PORT -C -N $TARGET