Check whether the remote port is enabled

Test whether the remote host port is opened by using telnet110.101.101.10180. You can also use method 1. nmapip-pport test port nmapip show all opened ports according to show close/open determine whether the port is opened... test whether the remote host port is opened by telnet 110.101.101.101 80. In addition, you can also use: Method 1. nmap ip-p port test port nmap ip shows all opened ports according to show close/open to determine whether the port is opened. Method 2. if the nc-v host port is not enabled, the returned status is non-0.