Some users may want to use Traefik for things that are not part of a TrueNAS SCALE App. For these users we support "External Services".
"External Services" are an advanced configuration option that lets you forward Traefik from Ingress to a service outside of the Container network. For example: A TrueNAS Host system. This allows you to, for example, use the same SSL certificates for both services inside and outside the TrueNAS SCALE App ecosystem.
External Services require both the IP Address and Port of the service you want to forward. These will internally create a special 'service' that receives traffic on the same ports (internally) and forwards it to the external service.
Additionally it creates an ingress which forwards traffic to the special forwarding service.