Telnet Connection Testing with curl

Thanks (again) to Rich Trouton for showing us a way of testing connectivity and uptime

You can use curl to create a telnet connection using a command similar to the one shown below:

curl -v telnet://ip.address.here:port.number.here

curl -v telnet://www.yahoo.com:443

Link
https://derflounder.wordpress.com/2021/05/23/using-curl-for-telnet-testing-on-macos-high-sierra-and-later/