synology ipv6 w/privado error

[PierreLevres]

I get some strange IPv6 errors (read in reverse order) on my synology w/privado provider. Any clues or hints?

2022-04-28 12:15:16 | stdout | Thu Apr 28 12:15:16 2022 Exiting due to fatal error
-- | -- | --
2022-04-28 12:15:16 | stdout | Thu Apr 28 12:15:16 2022 ERROR: Cannot open TUN/TAP dev /dev/net/tun: No such file or directory (errno=2)
2022-04-28 12:15:16 | stdout | Thu Apr 28 12:15:16 2022 OpenVPN ROUTE: failed to parse/resolve route for host/network: ::/0
2022-04-28 12:15:16 | stdout | Thu Apr 28 12:15:16 2022 OpenVPN ROUTE6: OpenVPN needs a gateway parameter for a --route-ipv6 option and no default was specified by either --route-ipv6-gateway or --ifconfig-ipv6 options
2022-04-28 12:15:16 | stdout | Thu Apr 28 12:15:16 2022 ROUTE6: default_gateway=UNDEF
2022-04-28 12:15:16 | stdout | Thu Apr 28 12:15:16 2022 GDG6: remote_host_ipv6=n/a

edit: IPv6 is not enabled on my home router, nor on my synology-box network adapter. enabling it in both places has no effect, same errors.

[shakal802]

Try to SSH into your Synology run:
sudo modprobe tun

This is only a temporary solution and will stop working after your synology reboots the next time. If you want to automate the process:

1. Create a bash script including the command above as save it as a ".sh" file
2. Store the .sh file in any of your volumes on your Synology
3. Create a "Triggered Task" in the Task Scheduler to run the script your saved to run at boot-up