Open Port Scanner Tool

Port scanning is a network security detection technique that sends probe requests to various ports on a target host to determine whether they are open, closed, or filtered. An open port means a service is listening and could be a potential attack vector. Regular scanning of your own servers helps identify unnecessary open ports and potential security risks.

Port scanning is crucial for network security: 1. Discover unnecessary open services to reduce attack surface; 2. Verify firewall rules are properly configured; 3. Detect unauthorized services or backdoor programs; 4. Meet security compliance audit requirements. Using TongBao VPN can hide your real IP address and protect your identity during security testing.