A question on accessing a HTTP instance via HAProxy reverse proxy

[bbyrd74]

So Im running AgentDVR on docker, and its SSL/TLS is disabled, only using port 80 for unencrypted.

So I set up an HAPROXY for SSL offload, sending all traffic to the container. Yet a client cannot connect, the server reports HTTPS access blocked.. But how is the instance even aware of this, as its only using insecure port 80?