G'day IvanAK,

You appear to have taken that code directly from the Net::Telnet documentation. That's fine.

Just before that example code, you'll see:

"... you must also know the user's shell prompt, which for this example is "bash$ " ..."

And just after, you'll see:

"The methods login() and cmd() use the prompt setting in the object to determine when a login or remote command is complete. Those methods will fail with a time-out if you don't set the prompt correctly."

So, check you have the correct prompt. The problem you've encountered may have nothing to do with an invalid username or password.