The port checker shows whether a TCP service on a selected host is reachable from outside. It is useful for web servers, SSH, mail, databases, VPNs, and game servers.
Open or closed
An open port means the connection was established. A closed or unreachable port may indicate a firewall, wrong address, stopped service, or hosting provider restriction.
Common ports
80 and 443 are commonly used for websites, 22 for SSH, 25/465/587 for mail, 53 for DNS, and 3306 or 5432 for databases. Keep only required ports open.
Security
This tool is intended for targeted checks of your own server and does not replace a full security audit. Do not scan third-party networks without permission.
The port checker shows whether a TCP service on a selected host is reachable from outside. It is useful for web servers, SSH, mail, databases, VPNs, and game servers.
Open or closed An open port means the connection was established. A closed or unreachable port may indicate a firewall, wrong address, stopped service, or hosting provider restriction.
Common ports 80 and 443 are commonly used for websites, 22 for SSH, 25/465/587 for mail, 53 for DNS, and 3306 or 5432 for databases. Keep only required ports open.
Security This tool is intended for targeted checks of your own server and does not replace a full security audit. Do not scan third-party networks without permission.
