Can’t connect Arc to Roon Core

Roon Core Machine

Late 2014 Mac Mini running OS Monterey
ROon Core recently and successfully updated to Roon 2.0

Networking Gear & Setup Details

Google Wifi Mesh, Roon Core is hardwired to a network switch which is connected to the Primary mesh router

Connected Audio Devices

Roon Core connected to Ropieee bridge to
DAC to Yamaha pre-amp

Number of Tracks in Library


Description of Issue

I’ve set port forwarding on the router but I’m getting this message
External port 55000/internal port 55000 - TCP

“connectivity”: {“status”:“NetworkError”,“status_code”:504,“error”:“error: Error: ETIMEDOUT, response code: undefined, body: undefined connected? undefined”},
“external_ip”: {“actual_external_ip”:“27.252.xx.xx”,“router_external_ip”:null},
“natpmp_autoconfig”: {“server_ip”:“”,“found_natpmp”:true},
“upnp_autoconfig”: {“status”:“NotFound”}

The port forwarding diagnostics you’ve provided suggest that UPnP is not properly configured on your router or not working correctly.

Please try the following steps in order:

  • Reboot your Roon Core and networking gear (router, modem, switches, etc.)
  • Try to enable UPnP/NATPMP in the web administration interface for the router
  • Try to manually open the port in your router’s port forwarding configuration
  • Make sure the IP/Port matches the Port listed in Roon → Settings → ARC
  • Check for any VPNs or Firewalls that might be interfering
  • Try to update your router firmware
  • Check if your modem is in Bridge mode and if not, try to place into Bridge mode

If you continue to experience difficulties, please tag the support team and include the following information:

  1. What is the make and model of your modem and router?
  2. Do you have any additional network hardware, like additional routers or managed switches?
  3. Who is your internet service provider and what is your geographic region?
  4. Is your Modem configured in Bridge Mode so that it operates only as a modem or do you have the ports forwarded on both?


2 posts were merged into an existing topic: ARC won’t connect

Hi @Tony_Chandler,

It looks like our community moderator team had some things for you to look at. Are you still having trouble? Is there anything we can do to assist?


A post was split to a new topic: Unable to connect Roon Arc, why?

Hi all - thanks so much for you help on this
The issue was that my Primary
Google Wifi router cannot be connected in bridge mode
I’ve since connected Roon Core to another router in the mesh and success!


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