ARC can't connect from outside to the Roon Software

Roon Core Machine

NUC11TNHi5
i5 CPU
16GB RAM

Networking Gear & Setup Details

Fritz!Box 6690Cable
ROCK is wired to the Router
No switch
No VPN

  1. Who is your internet service provider?
    Vodafone Cable Internet

  2. Please list the make and model of your modem and router?
    Fritz!Box 6690Cable

  3. Do you have any additional network hardware, like additional routers or managed switches?
    No additional hardware

  4. Does your network have any VPNs, proxy servers, or enterprise-grade security?
    No

Connected Audio Devices

Description of Issue -

What is the exact port forwarding error message you see in the Roon Settings → ARC tab?

The Roon Software says that the connection is ready. No error message.

The ARC Software on my iPhone (XS) iOS 17.02 can’t connect. My Provider is Telekom

The Problem is solved. I called my Internetprovider Vodafone. They installed the Dual Stack instead of the DS light. Now my Router is available from outside.

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