Something is trying to access my mac?

Hello,

 

Recently I have been getting a wired message on my mac. Im not a computer genious, so if Norton says that something / someone is trying to access my mac I am getting kind of worried. The message is: "The computer "111.221.74.19" is trying to get access to xpcproxy on your computer. Will you allow this connection?"

Please help me, what is this?

Best, Rasmus