Failed to copy a Protection Group due to "vSphere operation failure: The server refused connection"
During the replication, Boomerang appliance takes a snapshot of a Virtual Machine, and reads VM disk data from ESXi or vCenter host using a standard protocol supported by VMware. This error occurs if Boomerang cannot resolve the hostname or IP address of the ESXi or vCenter host. It can also occur if there is no route to the ESXi host.
In order to address the problem, please make sure:
- The network group where the Boomerang is installed has DNS configured correctly, can ping, lookup, and traceroute the hostname and IP addresses of ESXi or VCenter hosts.
- The Boomerang uses TCP port 902 during replication, ensure the port is not blocked between the Boomerang and ESXi or VCenter hosts.
- If the Boomerang fails to obtain DNS server address automatically, manually enter preferred DNS servers in Boomerang's Setting page.