Reverse tunneling to localhost using SSH (ngrok alternative)

localssh.sh

#!/bin/bash

# Requires 'GatewayPorts clientspecified' to be set in /etc/ssh/sshd_config

HOST="muetsch.io"
REMOTE_PORT="8080"
REMOTE_BIND_V4="127.0.0.1"
PROXY_URL="https://local.muetsch.io"

echo -e "----------- localssh -----------"
echo -e "Usage: localssh.sh <LOCAL_PORT>"
echo -e "--------------------------------"

if [[ "$1" == '' ]]; then
        echo -e "Missing parameter."
        exit 1
fi

echo -e ""
echo -e "Go to $PROXY_URL once the session is established"
echo -e ""

ssh -R "$REMOTE_BIND_V4:$REMOTE_PORT:localhost:$1" "$HOST"