About smartphone application

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Sandshark wrote:

ZeroTier doesn't really involve "advanced settings".  Once installed, you administer it via a web server, much like ReadyCloud.  But it has a lot more to offer than ReadyCloud, IMHO.

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I agree, particularly for business use cases.  And it doesn't require day to day administration, so it wouldn't take much time/energy once it was set up.

You do need to add/remove the client devices that are on the ZeroTier network.  In a business environment it'd be important to note which device is which (so you can remove devices that employees drop, and also remove devices owned by former employees).  

ReadyCloud or similar approaches require similar administration, though with many it would be managed account by account.  One benefit of ZeroTier's approach is that you can easily block access for a stolen or lost device.  With ReadyCloud, if the credentials are saved in the device you'd need to deactivate the account, and migrate all the data to a new one. Of course either way the data on the device is compromised.

ZeroTier does assume some knowledge of how layer 2 networks work - and in small businesses where tech support is a "side job", the tech person might not have that knowledge.  But there are some useful guides to get you started, and you don't need to use all the capabilities to set up a simple SDN.

Neither management approach scales very easily to a really large network (hundreds of employees), but I think ZeroTier should work well for smaller ones.