网络工具
端口检查器
检测任意主机或IP地址上的TCP端口是否开放 — 支持同时检查多个端口并测量延迟
Port Checker
Check if TCP ports are open on any host
3/20
Quick-add common ports
How it works
The check is performed server-side by attempting a connection to the specified host and port. A port is marked open if a response (of any kind) is received within 5 seconds. Firewalls may cause ports to appear closed even when a service is running. Ports 1–65535 are supported; up to 20 ports per check.