Live Recover and Live Mount error

Hi 

we are currently setting up a Test Environment to test Live Mount and Live recovery functionality in Commvault. 

When trying to Live Recover a previously backed up VM we get the following error message:

Tdfs::TdfsConfigClient::SendCommand(1854) - Error attaching to server. [0x80070057:{CCvNetwork::Attach_RemoteService(1770)} + {CCvNetwork::Attach_RemoteService(1713)} + {CCvNetwork::Attach_RemotePort(1351)/W32.87.(The parameter is incorrect. (ERROR_INVALID_PARAMETER.87))-Port passed is not valid. [3dfsService/0/0].}]

Tdfs::TdfsConfigClient::Start3dfsServerWithWait(1389) - 3dfs server failed to start. ret [-16]

CreateNASDatastore() - PlatformConfigFaultFault Exception - [An error occurred during host configuration.] - [Mount failed: Unable to complete Sysinfo operation.  Please see the VMkernel log file for more details.: Unable to connect to NFS server]

For a Live Mount we get:

VmOperation::LiveMount() - LiveMount Operation with error code [125], error message[Mount failed: Unable to complete Sysinfo operation.  Please see the VMkernel log file for more details.: Unable to connect to NFS server Operation failed, diagnostics report: Mount failed: Unable to complete Sysinfo operation.  Please see the VMkernel log file for more details.: Unable to connect to NFS server Refer https://kb.commvault.com/article/67989 for more information to resolve the issue.]

vAppWorker() - LiveMount operation failed with errorCode [318769636]

We assume this could be due to a firewall rule preventing the mount of the NFS datastore. Are there additional port requirements for this to work? Or could this be due to any other configuration error on our side?

Thanks a lot in advance.