"When I try to connect it from an external computer over the internet, then 69.117.132.xxx:8080 is not reachable."
That's ^^ the most important statement in the post.
Please try my suggestion, that you change the port forwarding rule to From ANY port to port 8080.
There is also another possibility. If you are using a domain name & not an IP address from outside your LAN, to use dyndns.
As I said before, there is no IP address in that external subnet that shows port 8080 opened. Make sure that DHCP hasn't changed your IP since you started your web server & check your configuration. Are you using apache or IIS server software?
How do you know when a politician is lying? His mouth is moving.