If the port is not open, you should see different output. Note: Once successfully connected, use Control+C to break the telnet connection. Note: You can also use a DNS address in place of ip.address.here.įor example, if you want to check if is responding on port 443, use the curl command shown below:Ĭurl -v telnet://You should see output similar to that shown ~ % curl -v telnet://* Trying 74.6.143.26. You can use curl to create a telnet connection using a command similar to the one shown below:Ĭurl -v telnet://ip.address.here: While there are alternative tools available for this task (like netcat), it’s also possible to still create a telnet connection on macOS using another tool: curlįor more details, please see below the jump. However, telnet did (and does) serve a useful function as a quick way to check if it is possible to connect to a remote server on a particular port. This was part of Apple’s overall effort to improve security, as telnet does not use encryption and its traffic can be intercepted and read. As part of introducing macOS High Sierra, Apple removed the telnet tool from macOS.

Free telnet for mac