There are a few methods for determining whether a particular port on a WAN (Wide Area Network) connection is open in a VPS:
- Online Resources: Numerous online resources, such canyouseeme.org, yougetsignal.com, and yourip.co, allow you to determine whether a port is open or not.
- Telnet is a command-line tool that can be used to determine whether a certain port on a distant host is open. The command “telnet [hostname or IP address] [port number]” must be entered into a command prompt or terminal window to utilize Telnet. You will receive a notification stating that you have connected to the remote host if the port is open. You will get a notice telling you that the port is closed.
- Port Scanner: To find out which ports are open on a remote host, a port scanner is a tool that may be used to scan a variety of ports on the host. Port scanners come in a variety of forms, including command-line tools and graphical user interface (GUI) programs. The popular port scanners Nmap, Zenmap, and Fiddler are a few examples.