Hi Daniele,
Thank you for the answer.
I can confirm that it works with a Synology directly connect to the optical fiber with my media converter.
It’s worked for long time. But the last upgrade of my Synology router erase my settings and I can’t find again the right settings.
It’s work in DMZ yes, but I don’t want to waste electricity and space for an equipment that just forward the traffic and do nothing 😉
Did you have any tech guy in the Sunrise Internet team who can help?