Network connectivity issues with Roon ARC due to timeout and configuration errors (ref#KHVRTM)

Support ARC: Port Forwarding Help
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Network Setup

· My only router was provided by my ISP

ARC Status

· ARC is *Not Ready*

Roon Error Code

· The ARC settings page says "Not Ready," but I can still connect to ARC via cellular data. I'm having another problem.

Describe the issue

{
"ipv4_connectivity": {"status":"NetworkError","status_code":504,"error":"error: Error: ETIMEDOUT, response code: undefined, body: undefined connected? undefined"},
"external_ip": {"actual_external_ip":"81.aaa.ddd.eee","actual_external_ipv6":"null","router_external_ip":"null"},
"natpmp_autoconfig": {"status":"NotFound"},
"upnp_autoconfig": {"server_ip":"192.168.1.1","found_upnp":true,"error":"doaction request return statuscode: UnknownError"}
}

Describe your network setup

Movistar,

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Hey @jlezaun67,

Thanks for writing in, and welcome to the Roon community! Sorry to hear about your issues with Arc.

This error indicates UPnP is available on the router but is failing for reasons not reported by the router or identified by Roon. In most cases, this means a firewall, VPN, or security software is interfering with UPnP.

  1. Restart your network hardware and update router firmware.

  2. Try to set up manual port forwarding in your router.

  • Make sure the IP/Port matches in any port forwarding rule you create.
  1. Toggle UPnP on/off in your router settings before attempting to autoconfigure again in Settings → Roon ARC.
  2. Double-check to make sure you don’t have any VPNs, Firewalls, or other network filtering software blocking Roon.
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Hi @jlezaun67,

We wanted to check in before this thread auto-closed - are you still encountering issues with port forwarding?

Movistar often implements CG-NAT in the anecdotal experience of users on this forum. CG-NAT will block ARC upstream of Roon and is outside of both of our control.

Fortunately, you can install Tailscale as a workaround to port forwarding. It’s particularly easy on Mac. Please follow the steps here, and you should be able to connect to ARC on cellular data in just a few minutes:

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