How can I block Apple's Apple Remote Desktop Agent completely?

How can I block Apple's remote Desktop Agent completely? Does anyone know because I have the latest version of Little Snitch and I want no way that someone can remotely login to my mac. What ports do I have to block for everything including Telnet and everything else? I would truly appreciate it. I have a question how my MacMini lost it's serial number?

 

Please Help,

RIch

 I will reply with a link to the machine specifics.

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