Hamachi problems

Hello everyone!

Me and my bro wanted to enjoy some LAN Gaming Action, but we have some problems on the way.

So basically I (Fedora) can't ping my friend's (windows 10) machine, but he can ping mine.

As I had some issues with hamachi before (when I was using win10) I knew what to check and fix, so on his side things look ok.

But since I'm not so technical when using GNU/Linux I don't know how to check stuff here and how to use firewall-config.

So any help how to add Hamachi to firewall whitelist or something? I'm using Haguichi because I like GUI

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One time when I wanted to ping him I got this: (firewall-config:10624): Gdk-WARNING **: 20:32:50.571: Tried to map a popup with a non-top most parent

EDIT: Tried to get remote access his PC via Rust Rest but I get "Remote desktop is offline" error and he can connect to mine, just like with hamachi