Setup Cloudflare Tunnel for SSH (WSL2) - No signup required

setup-cloudflared-wsl.sh

#!/bin/bash
# Setup Cloudflare Tunnel for SSH access from within WSL2
# Free, no signup required, reliable
# Run this script to create a public SSH tunnel

set -e

echo "╔══════════════════════════════════════════════════════════════╗"
echo "║       Cloudflare Tunnel SSH Setup (WSL2)                     ║"
echo "║       No signup required - completely free                   ║"
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 cloudflared is installed
if ! command -v cloudflared &> /dev/null; then
    echo "[1/3] Installing cloudflared..." 
    
    # Add cloudflare gpg key
    echo "  → Adding Cloudflare repository..."
    sudo mkdir -p --mode=0755 /usr/share/keyrings
    curl -fsSL https://pkg.cloudflare.com/cloudflare-main.gpg | sudo tee /usr/share/keyrings/cloudflare-main.gpg >/dev/null
    
    # Add repository
    echo "deb [signed-by=/usr/share/keyrings/cloudflare-main.gpg] https://pkg.cloudflare.com/cloudflared $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/cloudflared.list
    
    # Install
    echo "  → Installing cloudflared..."
    sudo apt-get update -qq
    sudo apt-get install -y cloudflared
    
    echo "  ✓ cloudflared installed"
else
    echo "[1/3] cloudflared 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 cloudflared tunnel
echo "[3/3] Starting Cloudflare Tunnel..."
echo ""
echo "╔══════════════════════════════════════════════════════════════╗"
echo "║  Cloudflare will display a URL like:                         ║"
echo "║  https://[random].trycloudflare.com                          ║"
echo "║                                                               ║"
echo "║  Share that URL to allow SSH access via:                     ║"
echo "║  ssh -o ProxyCommand='cloudflared access tcp --hostname %h' taky@[URL] ║"
echo "║                                                               ║"
echo "║  Or the tunnel will show a direct TCP endpoint.              ║"
echo "║  Press Ctrl+C to stop the tunnel.                            ║"
echo "╚══════════════════════════════════════════════════════════════╝"
echo ""
echo "Connection details:"
echo "  Username: $(whoami)"
echo "  Password: oijoij"
echo ""
echo "Starting Cloudflare Tunnel on localhost:2222..."
echo ""

cloudflared tunnel --url tcp://localhost:2222