I am the admin for 20 ClearOS systems in Europe and the Far East, and soon to be another system or two in USA.

We have used OpenVPN to create a simplistic mesh for failover in the event that our managed network between sites fails

The WAN router in each location has been configured with the relevant ClearOS as its default gateway.
In the event of any given WAN link failing traffic is routed over the OpenVPN tunnel.

Is there any way I can manage the settings on the ClearOS's from a single interface.

I am in the process, long overdue, of replacing the current v5 systems, yes I know it's EOL, running on desktop PCs,
with v7 running on server hardware, dual PSU, RAID disc, and am looking to see if the feature I am looking for is

1 Available
2 Level of subscription required

At the moment our v5 systems are all Community edition and we pay for content filter updates only.