Using telnet to Test Open Ports - Acronis
https://www.acronis.com/en-us/blog/posts/telnet/
WEBMay 16, 2023 · To open telnet, click "Go"> "Utilities"> "Terminal", then run the following command (the numbers are example IP address and port): telnet [domainname or ip] [port], e.g.>telnet 192.168.1.1 443. When a computer port is open, a blank screen will show up, meaning that the connection has been successful.
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