connection between Roon Core and Roon Arc doesn't work

Roon Core Machine

iMac Retina 4K 2019 3,2GHz 6-core intel Core i7
16GB 2667 Mhz DDR4

Modem + Router

USB connected to Cambridge Audio 200M
51463 tracks in library

Cannot connect Roon Act with Roon Core:

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

On both modem and router, I manually addressed a port with IP number and port number to Roon Act

What to do?

What country are you in and which ISP.
Make and model of the modem and router.

1 Like

Hey @Rudi_Hartmans,

Following up on this thread, are you still running into issues getting Arc up and running?

If so, could you please provide the information @ged_hickman1 has requested? The diagnostics you’ve provided suggest that UPnP is not properly configured on your router.

Please first try the following steps:

  • Try to enable UPnP/NATPMP in the web administration interface for the router directly upstream from your Core
  • 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
  • Check if your modem is in 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?