Caddy Reverse Proxy Setup

I need help setting up Caddy as a reverse proxy for several websites hosted on virtual machines behind a NAT router. Each site uses its own domain name.

Requirements

- Caddy configuration to route traffic to multiple VMs. - Access via private network addresses. - Proper handling of domain names for each site. Ideal Skills and Experience: - Proficient with Caddy and reverse proxy setups. - Experience with NAT and private networking. - Strong understanding of domain name configuration. Please provide your experience and approach.