Configuring telnetd

burglers · 01-06-2010, 07:18 AM

Hello

I want to experiment with telnet RFC 2217 "Com Port Control Option". How can I configure in.telnetd (Linux via inet) to start my program which handles RFC 2217 requests instead of default shell. Or at least does someone know a website that has more detailed information about telnet daemon than the man pages?

On the otherhand would it make sense to write my own basic telnet server to match my needs?

greetings -- burglers

Simon Bridge · 01-06-2010, 07:36 AM

It does not make sense to use telnet at all - this is a common vector for cracking attempts on servers. Consider performing similar actions using secure protocols.

burglers · 01-06-2010, 09:12 AM

Ok. looking into source code of inetutils didn't really clear up how services are registered to the telnet daemon. Another idea I've had meanwhile is, that telnetd just creates a pseudo terminal like /dev/pts/5 and Linux automatically detects this and connects it to a login shell. But yet I don't know any further.

@Simon: I'm just experimenting, security is currently not a question.