Hello everyone,

Sorry if the question was already posted, but the search is a little bit difficult here.

I'm currently running a Proxmox server hosted on a dedicated Hetzner server, and I am exploring the possibilities of configuring HAProxy for more advanced traffic routing between my VMs.

Here's the context of my existing setup:

• Server: Proxmox is hosted on a dedicated Hetzner server.
• Current Configuration: OPNsense is already in use as the firewall, and I'm considering integrating HAProxy for specific routing needs.

Before I lease another IP from Hetzner, I want to see if HAProxy can handle my specific requirements for directing traffic based on domain names. Specifically, I'm looking to set up routing rules like:

• Directing traffic for kasm.rogafe.domain exclusively to a VM designated for KASM.
• Routing all other subdomains matching *.rogafe.domain to a different VM called Cloud, where I run my docker using compose + traefik.

Diagram of the Setup:

https://preview.redd.it/crzq0yhkb2ad1.png?width=1783&format=png&auto=webp&s=db60fd7aa5e3b0841dd03adb33b4fcafd75e4bbf

My questions are:

Can HAProxy, when configured on OPNsense, handle this type of domain-based routing efficiently?

• Are there any special considerations or settings in HAProxy that I should prepare for to enable such routing?
• If anyone has implemented a similar configuration, could you share your insights or point out any potential issues I should be aware of?

I'm looking for any advice or experiences that could help me determine the feasibility of this setup without needing an additional IP.

I am also willing to use another proxy running on a VM, I saw Nginx Proxy Manager named a bunch here

Thanks in advance for your input!
Rogafe