ReadyNAS with native VPN support?

While not a full VPN, ReadyCloud, which is native to all current ReadyNAS models, allows you to map a drive in Windows to a remote ReadyNAS share.  There are other potential VPN solutions (I happen to like ZeroTier), but they must be installed; they aren't native.  ReadyCloud is definately the easier to set up.

Note that a ReadyCloud user and a local user are not the same user from the NAS's perspective, so that can limit the use of private home shares. Note, too, that the mapping for a share via ReadyCloud will be different from a local network mapping.  But as long as you know these up front and set things up accordingly, I think ReadyCloud will meet your needs.  A user can always use ReadyCloud even when on the local network, too, so everything stays consistent.  Netgear kinda points you in that direction, actually.