Open Port Check

ℹ️ Local Mode Heuristic Checks non-HTTP ports using timing analysis. Fast errors (<300ms) = Closed. Slow errors/Hang = Open.

⚠️ Browser Blocked Request You are on HTTPS but checking a local HTTP port. Browsers block this "Mixed Content" by default.

To fix: Click the 🔒 lock icon in the address bar → Site Settings → Allow "Insecure Content".