Adding a New Server to Existing Proxmox Cluster - Network Configuration and VM Communication

I’m looking for some guidance on expanding my Proxmox setup. Here’s my current setup and what I’m trying to achieve: Current Setup​ - I have a dedicated OVH server running Proxmox. - On this server, I have a pfSense VM that handles VPN access for employees to connect to the internal network. - The server has reached its capacity, and I need to add a new server to scale my infrastructure. What I Want to Achieve​ - Add a New Server: I want to install Proxmox on a new server and join it to the existing server to form a cluster. - VM Communication: After joining the cluster, I want VMs on the new server to be able to communicate with VMs on the old server. - Employee VPN Access: Employees should be able to access VMs on the new server via the existing pfSense VPN. Questions​ - **Cluster Setup:** Are there any specific considerations when joining the new server to the existing cluster to ensure seamless VM communication? - **pfSense and VPN:** Do I need to make any changes to pfSense (e.g., firewall rules, routing) to allow VPN access to VMs on the new server?