My problem with Roon ARC it doesn't work

[Robert_F]

@Norbert_Hiller, the diagnostics you’ve provided suggest that UPnP is not properly configured on your router.

Please first try the following steps:

• Try to enable UPnP/NATPMP in the web administration interface for the router directly upstream from your Core
• Try to manually open the port in your router’s port forwarding configuration
• Make sure the IP/Port matches the Port listed in Roon → Settings → ARC
• Check for any VPNs or Firewalls that might be interfering
• Check if your modem is in Bridge mode

If you continue to experience difficulties, please tag the support team and include the following information:

1. What is the make and model of your modem and router?
2. Do you have any additional network hardware, like additional routers or managed switches?
3. Who is your internet service provider and what is your geographic region?
4. Is your Modem configured in Bridge Mode so that it operates only as a modem or do you have the ports forwarded on both?

There is a useful guide a user posted on how to configure port forwarding on a Fritzbox 7590 for ARC also:

Port Forwarding Instructions for (Most) Fritz!Box Users

Here comes a step by step setup for Fritzbox and should work with most fritz routers. There are two prerequisites: ensure that your ISP allows access from outside via a public ipv4 address. This is mostly the case but in some cases you need to pay extra for that. This is discussed here and here ensure that there are no other routers in between your router (fritzbox) and the roon core. If you have a setup with multiple routers or repeaters ensure that they are configured as a mesh that onl…