I'm trying to connect to various RATs on my local PC such as Poison Ivy, Quasar RAT, EagleMonitor, and HorusEyes. I created the client using port 5858 and set the server to LISTENING mode. I assigned a dynamic domain on No-IP. When I test externally on websites to check if I can access the host:port, it works. I also run CMD tests to see if it's in LISTENING mode, and it is.

The problem is that when I run the client, it opens but is never recognized by the server as an infection — it only connects using 127.0.0.1. I disabled Windows protection, excluded the folder, and manually opened the port to rule out any issues.

Is there some kind of limitation between RATs and No-IP that prevents them from working or being detected, even though other host checks via the web succeed?