If a third party firewall is installed within your network, when processes are started as part of the software installation, firewall warnings might be generated.
Configure the firewall to allow communication between all nodes on one open port: 30304 (TCP).
Additional ports that might need to be opened are:
- User Interface, on port 443 (HTTPS), or the alternative specified during Master installation.
- vCenter proxies, also on port 443 (HTTPS), use the VDDK and vSphere web API to talk to the vCenter.
- VMware proxies, on port 902, are instructed by the vCenter to talk to the ESXi host for virtual disk transfer.