Check port number is opened or not
You can check if a port is open in your network by issuing the telnet command. If it is open, you will see a blank screen after issuing the command:
telnet [domainname or ip] [port]
where
[domainname or ip] is the domain name or IP address of the server to which you are trying to connect
[port] is the port number where the server is listening
If the port is open, you will see a blank screen. This will mean that connection is successful.
For example
telnet contoso 443
You can check if a port is open in your network by issuing the telnet command. If it is open, you will see a blank screen after issuing the command:
telnet [domainname or ip] [port]
where
[domainname or ip] is the domain name or IP address of the server to which you are trying to connect
[port] is the port number where the server is listening
If the port is open, you will see a blank screen. This will mean that connection is successful.
For example
telnet contoso 443
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