Is it wise to make server VPN access only

Hi, I am trying to make our secure as much as possible. I want to make our server accessible with dedicated VPN IP only, and drop all other requests for root and privileged users. Would be it wise decision to make such change?

Secondly, would you recommend me to use VPN services providing me with dedicated IPs or setting up a new server solely for VPN purposes? I have used PureVPN in the past but their IPs were detected by Proxy check tools on or similar tools, not sure if it has effect on VPN security though.

What would you recommend?

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