PortSnap

PortSnap is a native TCP port scanner and security monitoring tool for checking the exposure of hosts you own or are authorized to test. Run real TCP connection checks and watch open ports appear as they are discovered. Each open port is matched with a built-in service database, assigned a risk level, and included in an overall security grade from A to F with practical recommendations. Add important hosts to a Watchlist to re-check them manually or through supported background refresh and receive local notifications when ports or security grades change. Inspect TLS/SSL certificates for issuer, subject, expiration, and self-signed status, and review common HTTP security headers such as HSTS, X-Content-Type-Options, X-Frame-Options, and Content-Security-Policy. PortSnap can also detect your router gateway for quick local scans and keeps a history of previous results with favorites and…