Telnet.DialToAndCallTLS(':5555', caller, tlsConfig)Ī more useful TELNET servers can be made using the '/reiver/go-telnet/telsh' sub-package.įunc fiveHandler(stdin io.ReadCloser, stdout io.WriteCloser, stderr io.WriteCloser, args. Telnet.DialToAndCall(':5555', caller)įunc main() Configure the TLS connection here, if you need to. Var caller telnet.Caller = replace ':5555' with address you want to connect to. If you wanted to test out this very very simple TELNETS server, get the telnets client program from here: TELNET Client Example: package main (The difference between we use the telnet.ListenAndServeTLS func instead of the telnet.ListenAndServe func.) package mainĮrr := telnet.ListenAndServeTLS(':5555', 'cert.pem', 'key.pem', handler) The code to make a TELNETS server is very similar to the code to make a TELNET server. That is important, as the value used by your TELNET server and the value used by your TELNET client must match.) Very Simple (Secure) TELNETS Server Example (Note that we use the same TCP port number - '5555' - as we had in our code. An attacker can easily intercept TELNET packets and recover the data (plaintext) in transit, including the username and password. One of the biggest problem of TELNET is that the connections between TELNETclient and TELNETserver is not encrypted. If you wanted to test out this very very simple TELNET server, if you were on the same computer it was running, you could connect to it using the bash command: telnet localhost 5555 TELNET is fast because it is stripped down but it is not intuitive since it is purely command based.

Var handler telnet.Handler = telnet.EchoHandlerĮrr := telnet.ListenAndServe(':5555', handler) 'Submit' means typing something and then pressing the key.) package main

(By default, a TELNET client does not send anything to the server until the key is pressed.

This particular TELNET server just echos back to the user anything they 'submit' to the server. Online documentation, which includes examples, can be found at: Ī very very simple TELNET server is shown in the following code. (TELNETS is secure TELNET, with the TELNET protocol over a secured TLS (or SSL) connection.) Documention The telnet package provides an API in a style similar to the 'net/http' library that is part of the Go standard library, including support for 'middleware'. Package telnet provides TELNET and TELNETS client and server implementations, for the Go programming language.

Telnet server vs client