Very good, that makes things much easier. Has been a while since I used pihole but when I did I used pihole to serve the internal IPs.
This is the perfect opportunity to set up a pihole. Its primary purpose is to block ads network wide but since it is essentially a DNS with a block list you can also set custom dns-entries.
AMD EPYC 7B12 / 256GB RAM / Supermicro H12SSL-i / 4x2TB Samsung 980 Pro in ZFS RAIDZ-10
Total overkill for what is currently running on it. But who knows what the future brings.
Current:
Docker-based
As a VM in Proxmox VE
As an LXC in Proxmox VE
Ha, same here. HAProxy plugin running on my opnSense. I should probably try caddy because HAProxy is complete overkill for my requirements.