Note that the issue does not extend to all Vodafone subsidiaries or networks outside Germany, as far as we know. I strongly recommend users still continue to troubleshoot even if Vodafone is their provider, as we may be able to find a temporary workaround or identify an issue unrelated to carrier-grade NAT/IPv6.
Thank you for your patience and believe me, I relate to your frustration as I’ve bumped up against carrier-grade NAT myself. Some internet service providers offer public IPv4 addresses for residential accounts; some even offer it for free. Others do not offer it all, and resort to a more basic implementation of DS-Lite that does not support port forwarding for any use. Certain users will be frustratingly arrested if their internet service provider is not willing to work with them. The timeline is unclear for a resolution from the Roon team side; it may take longer than any of us want, and it may never work for every user. That said, rest assured we are aware of the quandary you’re in at this time and are working to make ARC a workable app for as many users as possible, given the limitations and variations inherent to internet service providers.
You can also try to call Vodafone support and ask nicely, if it is possible to get a proper IPv4 address as well. I had similar issues with 1&1 three weeks ago and they were able to provide a the IPv4 address for 3 DSL contracts in Berlin after a call. I don’t want to promise anything as I am unsure, if Vodafone Germany will offer the same thing…
Hi all and @Roon_2.0_ARC_Support, it seems possible to add a „dynamic public IPv4“ free of charge. I was a bit confused because I thought I need a static IPv4…
But at the end: it works.
So it seems to be a solution.
Or is it a „false“ or „unstable“ solution?
According to my research with Vodafone Germany you may or may not be lucky. Their forum had many recent threads where they said no to customers requesting it. I received a letter in 2019 saying that they won’t provide one anymore. In the best case though, any IPv4 for residential accounts is apparently purely goodwill and they can take it away at any time because the contract does not promise it. The option is only part of the contract for business accounts
I don’t know if I‘m lucky because we‘re talking about a dynamic (public) IPv4. I‘m not so much into it, that I know if it‘ll work stable and ongoing.
But what I can say, that there might be an option for some users.
Yes, a dynamic public IPv4 address that can be port-forwarded is what I am talking about. Residential Vodafone Germany contracts don’t promise this and they are routinely denying to set them up (though possibly not always and they seem to be leaving existing ones alone for the time being but without promises)
Dynamic vs Static in my understanding a dynamic address can and will change. If your router is discovering that address via DHCP (which is often a default) it will pick up on that as and when it changes and adjust accordingly. Ergo that aspect of it works for the purposes of ARC.
The secondary issue is that the dynamic ip allows port forwarding, that’s the method of opening a pinhole in your firewall for ARC to communicate with the remote ARC device.