Roon Core Machine
(MacBook Air 2020, M1, 8GB)
The diagnostics you’ve provided suggest there is a redundant layer of network address translation preventing port forwarding.
This can either be at the local-network level (commonly as a result of two routers), or at the level of your service provider (in the form of carrier-grade NAT).
If your setup involves an ISP-provided gateway (modem/router combination) and your own third-party router:
In the web administration interface of the ISP-provided gateway (modem/router combination), enable Bridge Mode or equivalent, where the ISP-provided gateway does not have DHCP routing enabled.
Alternatively, if you have already created a manual port forwarding rule in your 3rd party router, you can add an additional rule to forward the port through the ISP/second router.
If you only have one router in your setup or your modem is already in Bridge mode, please take a look through our list of known router and internet service provider solutions, as other users may have already encountered the same situation: ISPs and Routers: List of Known Solutions and Workarounds
You can reach out directly to your service provider to ask if they support port forwarding; this question will often enough to prompt them to explain whether or not the carrier-grade NAT they’ve implemented can function with ARC.
More specifically, you can pass along the following questions:
If you’re unable to locate an existing solution in our #support:port-forwarding-resources subcategory, please reach out to the Roon support team and include the following information:
Hi @Jeppe2138,
We wanted to check in since this thread was in danger of auto-closing due to a lack of activity.
We’ve taken a quick glance at the basic account info that reaches our servers, and we can’t verify that you’ve been able to auto-configure or manually configure ARC with the steps above. Are you still stuck with a multipleNAT
situation when attempting to set up ARC?
It the Settings page retains this error despite Bridging the upstream modem and verifying UPnP is on in your primary router, then I recommend trying a slightly different port assignment next to the static IP. If the diagnostic code still lists a multipleNAT
situation, then it’s most likely CG-NAT on the part of your ISP, and you’ll need to inquire if a dedicated IPv4 address or IPv6 via full dual stack is available.
Thank you!
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