claudetools/Diagnose-VPN-Interface.ps1

# Diagnose VPN interface while connected
# Run this WHILE VPN IS CONNECTED

Write-Host "=== VPN Interface Diagnostic ===" -ForegroundColor Cyan
Write-Host ""

# Check VPN connection status
Write-Host "[1] VPN Connection Status:" -ForegroundColor Yellow
$rasStatus = rasdial
Write-Host $rasStatus -ForegroundColor Gray
Write-Host ""

# Show ALL network adapters (including disconnected, hidden, etc.)
Write-Host "[2] ALL Network Adapters (including disconnected):" -ForegroundColor Yellow
Get-NetAdapter | Select-Object Name, InterfaceDescription, Status, InterfaceIndex |
    Format-Table -AutoSize
Write-Host ""

# Show adapters with "WAN" in the name
Write-Host "[3] WAN Miniport Adapters:" -ForegroundColor Yellow
Get-NetAdapter | Where-Object {
    $_.InterfaceDescription -like "*WAN*"
} | Select-Object Name, InterfaceDescription, Status, InterfaceIndex |
    Format-Table -AutoSize
Write-Host ""

# Show RAS connections (another way to see VPN)
Write-Host "[4] RAS Connections:" -ForegroundColor Yellow
try {
    Get-VpnConnection | Select-Object Name, ConnectionStatus, ServerAddress |
        Format-Table -AutoSize
}
catch {
    Write-Host "Could not query VPN connections" -ForegroundColor Gray
}
Write-Host ""

# Show IP configuration for all interfaces
Write-Host "[5] IP Configuration:" -ForegroundColor Yellow
Get-NetIPAddress | Where-Object {
    $_.AddressFamily -eq "IPv4"
} | Select-Object InterfaceAlias, IPAddress, InterfaceIndex |
    Format-Table -AutoSize
Write-Host ""

# Show routing table
Write-Host "[6] Routing Table (looking for VPN routes):" -ForegroundColor Yellow
Write-Host "Full routing table:" -ForegroundColor Gray
route print
Write-Host ""

# Check if we can reach remote network WITHOUT explicit route
Write-Host "[7] Testing connectivity to remote network:" -ForegroundColor Yellow

Write-Host "Testing DNS server (192.168.0.2)..." -ForegroundColor Gray
$pingDNS = Test-Connection -ComputerName 192.168.0.2 -Count 2 -ErrorAction SilentlyContinue

if ($pingDNS) {
    Write-Host "[OK] DNS server 192.168.0.2 IS reachable!" -ForegroundColor Green
    Write-Host "Average response time: $([math]::Round(($pingDNS | Measure-Object -Property ResponseTime -Average).Average, 2))ms" -ForegroundColor Green
}
else {
    Write-Host "[INFO] DNS server 192.168.0.2 not reachable" -ForegroundColor Yellow
}

Write-Host "Testing router (192.168.0.10)..." -ForegroundColor Gray
$pingRouter = Test-Connection -ComputerName 192.168.0.10 -Count 2 -ErrorAction SilentlyContinue

if ($pingRouter) {
    Write-Host "[OK] Router 192.168.0.10 IS reachable!" -ForegroundColor Green
    Write-Host "Average response time: $([math]::Round(($pingRouter | Measure-Object -Property ResponseTime -Average).Average, 2))ms" -ForegroundColor Green
}
else {
    Write-Host "[INFO] Router 192.168.0.10 not reachable" -ForegroundColor Yellow
}

if ($pingDNS -or $pingRouter) {
    Write-Host "`n[IMPORTANT] Remote network IS accessible!" -ForegroundColor Green
    Write-Host "This means routes might be automatically configured by UniFi!" -ForegroundColor Green
}
else {
    Write-Host "`n[INFO] Remote network not reachable" -ForegroundColor Gray
    Write-Host "This is expected if routes aren't configured" -ForegroundColor Gray
}
Write-Host ""

# Try traceroute to see the path
Write-Host "[8] Traceroute to 192.168.0.2 (first 5 hops):" -ForegroundColor Yellow
try {
    $trace = Test-NetConnection -ComputerName 192.168.0.2 -TraceRoute -Hops 5 -WarningAction SilentlyContinue
    if ($trace.TraceRoute) {
        Write-Host "Path:" -ForegroundColor Gray
        $trace.TraceRoute | ForEach-Object { Write-Host "  $_" -ForegroundColor DarkGray }
    }
}
catch {
    Write-Host "Traceroute not available or failed" -ForegroundColor Gray
}
Write-Host ""

Write-Host "=== Analysis ===" -ForegroundColor Cyan
Write-Host "Look at the output above to identify:" -ForegroundColor White
Write-Host "  1. Any adapter with 'WAN', 'PPP', 'L2TP', or 'RAS' in the description" -ForegroundColor Gray
Write-Host "  2. Any new IP addresses that appeared after VPN connection" -ForegroundColor Gray
Write-Host "  3. Routes to 192.168.0.0 or 10.x.x.x in the routing table" -ForegroundColor Gray
Write-Host ""