Connection Failed: Please check network cables and configuration

I need help with my Borderlands 2 for X1. I’m trying to play with my friend but the message “Please check network cables and configuration” appears. My internet is working fine and my connection w my friend is good

The netcode is just really bad.

I found that having a “Strict Nat” will cause that issue.

I’ill try it here, i found a video, but anyway thx