Set up VPN Server - Synology DSM Help Set up your Synology NAS as a VPN server to allow secure and remote access to rescourses shared within the local network of your NAS
How do I set up my Synology NAS as a VPN server? Set up your VPN clients by following the instructions in this article Connect the VPN clients to the VPN server and set them up on your Synology NAS to access other network devices that are connected to your local network