HELP! NGINX Local LAN

[paynent]

Hello All,

Trying to get my web proxies to work on my local LAN. Everything works externally. I've followed several guides. From what I can find though my box is only listening on my webgui port on the lan 8443 and not listening on any other port. I've got the DNS names redirecting to the firewall IP, but nothing is listening. When I run a test-netconnection against my LAN firewall IP I get a failure (including ping) for any port that isn't the webgui.

I figure I'm probably doing something stupid. but I'm at a loss.

[cookiemonster]

With this description it is incredibly hard to figure out how the packets are meant to flow. From where to where.
Web proxies for instance. Are they proxies on the LAN, filtering out from LAN clients? Or something else?
What works externally? External is clear but what is client, how are those packets flowing?
What is DNS in this context to do with the situation, which suggests that you think your clients are't resolving names - perhaps of your proxies?
All in all, it is very unclear (to me).