WSL2 SSH Diagnostic & Fix Script

fix-wsl-ssh.ps1

# WSL2 SSH Fix Script - Diagnose and repair SSH connection
# Run this in PowerShell as Administrator

Write-Host "╔══════════════════════════════════════════════════════════════╗" -ForegroundColor Cyan
Write-Host "║          WSL2 SSH Diagnostic & Fix                           ║" -ForegroundColor Cyan
Write-Host "╚══════════════════════════════════════════════════════════════╝" -ForegroundColor Cyan
Write-Host ""

Write-Host "[1/7] Checking WSL status..." -ForegroundColor Green
$wslUser = wsl whoami
Write-Host "  → WSL User: $wslUser" -ForegroundColor White

Write-Host "[2/7] Checking if SSH is installed..." -ForegroundColor Green
wsl bash -c "dpkg -l | grep openssh-server | head -1"

Write-Host "[3/7] Installing/reinstalling SSH server..." -ForegroundColor Green
wsl bash -c @'
sudo apt update -qq 2>&1 | grep -v "Hit:" || true
sudo apt install -y openssh-server
'@

Write-Host "[4/7] Configuring SSH (port 2222, password auth)..." -ForegroundColor Green
wsl bash -c @'
sudo sed -i 's/#Port 22/Port 2222/' /etc/ssh/sshd_config
sudo sed -i 's/^Port 22/Port 2222/' /etc/ssh/sshd_config
sudo sed -i 's/#PasswordAuthentication yes/PasswordAuthentication yes/' /etc/ssh/sshd_config
sudo sed -i 's/PasswordAuthentication no/PasswordAuthentication yes/' /etc/ssh/sshd_config
sudo sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin no/' /etc/ssh/sshd_config

# Show current SSH config
echo ""
echo "SSH Config (relevant lines):"
grep -E "^Port|^PasswordAuthentication|^PermitRootLogin" /etc/ssh/sshd_config
'@

Write-Host "[5/7] Setting password for user..." -ForegroundColor Green
wsl bash -c "echo '$wslUser:oijoij' | sudo chpasswd"
Write-Host "  → Password set to: oijoij" -ForegroundColor White

Write-Host "[6/7] Starting SSH service..." -ForegroundColor Green
wsl bash -c @'
sudo service ssh stop 2>/dev/null || true
sleep 1
sudo service ssh start
sleep 2

# Check if SSH is actually running
if sudo service ssh status | grep -q "running"; then
    echo "  ✓ SSH service is running"
    
    # Check if 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 "Ports currently listening:"
        sudo netstat -tlnp 2>/dev/null | grep sshd || echo "No SSH ports found"
    fi
else
    echo "  ✗ SSH service failed to start"
    echo ""
    echo "SSH service status:"
    sudo service ssh status
fi
'@

Write-Host "[7/7] Testing SSH connection..." -ForegroundColor Green
Write-Host "  → Attempting connection to localhost:2222..." -ForegroundColor White

# Test SSH with password (requires sshpass or manual password entry)
Write-Host ""
Write-Host "Testing SSH connection (you may need to enter password: oijoij):" -ForegroundColor Yellow
ssh -p 2222 -o StrictHostKeyChecking=no -o UserKnownHostsFile=NUL $wslUser@localhost "echo '✓ SSH connection successful!' && uname -a"

if ($LASTEXITCODE -eq 0) {
    Write-Host ""
    Write-Host "╔══════════════════════════════════════════════════════════════╗" -ForegroundColor Green
    Write-Host "║                  SSH is Working!                             ║" -ForegroundColor Green
    Write-Host "╚══════════════════════════════════════════════════════════════╝" -ForegroundColor Green
    Write-Host ""
    Write-Host "Connection Details:" -ForegroundColor Cyan
    Write-Host "  Host: localhost (or your public IP)" -ForegroundColor White
    Write-Host "  Port: 2222" -ForegroundColor White
    Write-Host "  Username: $wslUser" -ForegroundColor White
    Write-Host "  Password: oijoij" -ForegroundColor White
} else {
    Write-Host ""
    Write-Host "╔══════════════════════════════════════════════════════════════╗" -ForegroundColor Red
    Write-Host "║              SSH Connection Failed                           ║" -ForegroundColor Red
    Write-Host "╚══════════════════════════════════════════════════════════════╝" -ForegroundColor Red
    Write-Host ""
    Write-Host "Diagnostic information:" -ForegroundColor Yellow
    Write-Host ""
    
    Write-Host "WSL IP address:" -ForegroundColor Cyan
    wsl ip addr show eth0 | Select-String "inet\b"
    
    Write-Host ""
    Write-Host "SSH service status:" -ForegroundColor Cyan
    wsl sudo service ssh status
    
    Write-Host ""
    Write-Host "Listening ports:" -ForegroundColor Cyan
    wsl sudo netstat -tlnp | Select-String "2222"
    
    Write-Host ""
    Write-Host "Try manually starting SSH:" -ForegroundColor Yellow
    Write-Host "  wsl sudo service ssh restart" -ForegroundColor White
}

Write-Host ""