Remote Operation of Synology NAS

[simbun]

You haven't said what you want to connect from, but assuming it's a phone that you can install apps onto tailscale is probably your best bet. Synology install instructions here.

It's a VPN so you'll need to establish the VPN connection to your Synology first (open the tailscale app on the mobile) then connect to your MinimServer configuration page and once you've made the changes shut the tailscale app down, otherwise all your traffic will be going via the Synology.

Tailscale doesn't require you to open any ports so is more secure.