vRanger VA replication will fail if the required communication ports are blocked.
The VA will need communicate with the same resources as vRanger. Occasionally firewall exceptions are overlooked for the VA causing VA replications to fail.
The VA will need access to Port 443 when communicating with a Virtual Center.
Ports 443 and 902 are required when communicating with ESX(i) hosts.
Port 22 is required to communicate with other VA's for replication.