What is a port checker?

A Port Checker is a tool or service used to test whether a specific port on a network or device is open and accessible from the internet. It helps users verify if their firewall or network settings allow incoming or outgoing connections on a particular port. This is especially useful for troubleshooting network issues, setting up servers, or ensuring secure network configurations. By using a Port Checker, users can quickly identify and resolve connectivity problems related to blocked or filtered ports.