I can host netplay but I cannot join my friends.

[DylanScarlata]

Hello, I'm not super tech savvy so I might be doing something wrong. But netplay traversal settings was working fine for a while but all of a sudden I couldn't join any games. I can host and people can join me just fine, but I cannot join anyone else. I've tried completely reinstalling dolphin and using the newest version. My friend and I went through the hassle of port forwarding and when he did that I was able to join him finally but that didn't fix it for anyone else and if he isn't doing port fowarding I cannot join him. Is there anyway to go back to how it was so I can join all of my friends? I'm currently trying to join with Dolphin 5.0-321 but the issue is across every version I've tested. EDIT: I forgot to say that I'm using an ethernet connection and I've tried disabling my firewall.