Home Assistant in a VM to connect to Authentik through NPM

[FlexibleToast]

I'm confused and not sure how to continue troubleshooting from here. To explain my setup I have a home server running Unraid. Unraid is running Home Assistant in a VM, Authentik in docker, and Nginx Proxy Manager in docker. I'm trying to setup Home Assistant to use OIDC with Authentik. The problem I'm running into is purely networking and I'm not sure why.

The problem: Home assistant cannot talk to any service through NPM.

Observations:

• curl https://auth.example.com returns failed to connect, could not connect to server
• curl -k https://192.168.10.20:7443 works fine
• traceroute to any address that isn't hosted by NPM shows all the hops as expected
• traceroute to anything hosted by NPM such as auth.example.com returns only two hops. the first hop being the home assistants docker network IP (it appears to be running at least the terminal app, maybe all of home assistant in docker despite being its own VM), then the external IP address of my network. It doesn't seem to hop to my router, or if it is the router is replying immediately that it is the external IP
• If I try to access a service hosted by NPM from any other computer on the network, it works exactly as expected. Even another VM on the same Unraid host.

It seems like there is something wrong with the way traffic is being routed from Home Assistant to NPM and I'm not sure why.