Hello all! I'm new to this forum and I got a little question about hacking a personal computer or your own server. I recently tried to hacking my own server (not in my lan to make it harder) and I gained total control of it by uploading a shell. (through uploading a .jpeg and editing etc...) But now, I wanted to know how to hack into it through a port. I got the IP and let's say, there is an open port found (like a random one, 13455 for example). How could I use that to my advantage? To gain control, I should be able to upload a file or run a file to open up the port and listen to my commands and execute them. But I don't really understand how to get there... Use an exploit? But I don't know why the port is open,... Any help to get me in the right direction? Thanks in advance!