Use IIS/RDS Gateway as reverse proxy with docker/traefik

Question

Hi,

I need to put a RDS gateway and a docker webserver behind the same public IP (reverse proxy?). Can anyone provide advice on how to do that?

We currently have 2x public IPs. One points to our RDS gateway/server and the other a docker host that uses Traefik to enable access to several containers.

Due to some other work we have going on I need to make RDS and docker available on the same Public IP.

RDS: rds.domain.co.uk

Docker: inventory.domain.co.uk, holiday.domain.co.uk

I assumed it would be as simple as:

Forwarding 443 to the RDS server

Configuring a rule in IIS to redirect anything with a matched url (inventory or holiday) to dockers private IP.

All the guides I find talk about URL rewriting which I'm not sure why I would need to touch? They also talk about SSL offloading but I'd like to leave that with Trafik and make IIS simply forward the connections.

I must be using the wrong terminology (or my google foo sucks).

Can anyone point me in the right direction?