The knowledge base only confirms that Tailscale can be installed on a Synology NAS and then brought up with the client command, but it does not contain a Synology-specific step-by-step installation guide for DSM.
What it does provide is:
1. Install the Tailscale client on the NAS.
2. Use the client command to connect:
- tailscale up
3. If needed, allow the current user to run Tailscale commands:
- sudo tailscale set --operator $USER
4. You can also check status with:
- tailscale status
For remote access without opening ports, the relevant forum fragment indicates using Tailscale client access from the PC and then reaching the NAS through the Tailscale IP address over HTTPS, for example:
- https://100.93.xxx.xxx:5001
The knowledge base also mentions that on Synology you can configure application access ports through:
- Control Panel > Application Portal
But it does not say to use that for Tailscale setup itself.
So, based on the provided fragments, the answer is: install Tailscale on the NAS, authenticate it with tailscale up, optionally set the operator with sudo tailscale set --operator $USER, and then access the NAS via its Tailscale IP address rather than opening router ports.
Sources used: [6], [7], [9]