Check open TCP ports on any public server or IP address. Choose a port preset and start scanning.
This free online port scanner checks whether TCP ports are open or closed on any public server or IP address. It covers the most common ports used by web servers, mail servers, databases, and other network services.
Open ports indicate active services. Unexpectedly open database ports (MySQL, PostgreSQL, Redis, MongoDB) without firewall protection are a serious security risk and should be investigated immediately.