Setup ngrok SSH tunnel from within WSL2

setup-ngrok-wsl.sh

#!/bin/bash
# Setup ngrok tunnel for SSH access from within WSL2
# Run this script to create a public SSH tunnel

set -e

echo "╔══════════════════════════════════════════════════════════════╗"
echo "║          ngrok SSH Tunnel Setup (WSL2)                       ║"
echo "╚══════════════════════════════════════════════════════════════╝"
echo ""

# Check if running in WSL
if ! grep -q microsoft /proc/version; then
    echo "ERROR: This script must be run from WSL2"
    exit 1
fi

# Check if ngrok is installed
if ! command -v ngrok &> /dev/null; then
    echo "[1/3] Installing ngrok..." 
    
    # Download ngrok
    echo "  → Downloading ngrok for Linux..."
    cd /tmp
    curl -s https://bin.equinox.io/c/bNyj1mQVY4c/ngrok-v3-stable-linux-amd64.tgz -o ngrok.tgz
    
    echo "  → Extracting..."
    tar xzf ngrok.tgz
    
    echo "  → Installing to /usr/local/bin..."
    sudo mv ngrok /usr/local/bin/
    sudo chmod +x /usr/local/bin/ngrok
    
    echo "  ✓ ngrok installed"
else
    echo "[1/3] ngrok already installed ✓"
fi

# Ensure SSH is running
echo "[2/3] Checking SSH service..."
if ! sudo service ssh status | grep -q "running"; then
    echo "  → Starting SSH service..."
    sudo service ssh start
    sleep 2
fi

if sudo service ssh status | grep -q "running"; then
    echo "  ✓ SSH service is running"
else
    echo "  ✗ SSH service failed to start"
    echo ""
    echo "Try running: sudo service ssh restart"
    exit 1
fi

# Check if SSH is listening on port 2222
if sudo netstat -tlnp 2>/dev/null | grep -q ":2222"; then
    echo "  ✓ SSH listening on port 2222"
else
    echo "  ✗ SSH not listening on port 2222"
    echo ""
    echo "Check SSH config: sudo nano /etc/ssh/sshd_config"
    echo "Ensure: Port 2222"
    exit 1
fi

# Start ngrok
echo "[3/3] Starting ngrok tunnel..."
echo ""
echo "╔══════════════════════════════════════════════════════════════╗"
echo "║  ngrok will display a URL like:                              ║"
echo "║  tcp://0.tcp.ngrok.io:12345                                  ║"
echo "║                                                               ║"
echo "║  Share that URL to allow SSH access.                         ║"
echo "║  Press Ctrl+C to stop the tunnel.                            ║"
echo "╚══════════════════════════════════════════════════════════════╝"
echo ""
echo "Connection details:"
echo "  Username: $(whoami)"
echo "  Password: oijoij"
echo ""
echo "Starting ngrok tunnel on port 2222..."
echo ""

ngrok tcp 2222