Vodafone Germany: No port forwarding for home accounts. DS Lite Tunnelled IPv4 address that doesn't do port forwarding. [NOT Resolved for Most Users; See Posts. Roon Investigating] - ARC: Port Forwarding Resources -
FritzBox: Portfreigabe einrichten – so einfach geht's
Set up port forwarding in your Fritzbox with FritzOS 7.50 | Marcel Scholz - YouTube
Enable port forwarding for the AVM FRITZ!Box 7490 - cFos Software
Vodafone Germany w/ ISP-Supplied Modem/Router (Fritz!Box or Touchstone): Ongoing Discussion - ARC: Port Forwarding Help - Roon Labs Community