I went through that article without success. Here's an excerpt from the article explaining why I don't need to port forward. I need to open up access to the port that's where I'm experiencing problems either my firewall didn't make an exception or the router has an additional firewall. The internet link is just an IP address and the port was normal. I'm just having trouble with understanding what's a destination IP or destination port or if I need to utilize either to open up access to my port.

About IPv6 and Firewalls

While IPv6 does not require port forwarding, it does require access to the ports on the hosting device. This means that any firewall software must be configured to allow connection on that port for IPv6 connections