Thank you for taking the time writing all this up for me. That makes me glad I asked because most info I was finding with google-foo was telling me to set up port forwarding the old way with my router and not really doing a good job of laying out how and why it works to begin with. After having switched from Tribbler to a client that has uPNP, now I think I understand why I’m struggling with it less. I’m unsure if my Soulseek is connected and sending data right but this gives me some better ideas of how to find out.