Roon ARC - no connection

Roon Core Machine


Networking Gear & Setup Details

Asus ZenWiFi XD6 Double WAN configuration with 2 LTE routers in bridge mode.

Connected Audio Devices

Number of Tracks in Library

40k tracks

Description of Issue

Trying to make Roon ARC working, unfortunately w/o success.
Independently whether I turn on the UPnP or set port forwarding on the router I got one of the following results when testing ARC connection in Roon settings.

"connectivity": {"status":"NetworkTimeout","status_code":998,"error":""},
"external_ip": {"actual_external_ip":"46.ddd.jjj.kkk","actual_external_ipv6":"null","router_external_ip":"null"},
"natpmp_autoconfig": {"status":"NotFound"},
"upnp_autoconfig": {"status":"NotFound"}
"connectivity": {"status":"NetworkError","status_code":504,"error":"error: Error: ETIMEDOUT, response code: undefined, body: undefined connected? undefined"},
"external_ip": {"actual_external_ip":"46.ddd.jjj.kkk","actual_external_ipv6":"null","router_external_ip":"null"},
"natpmp_autoconfig": {"status":"NotFound"},
"upnp_autoconfig": {"status":"NotFound"}

I checked firewall logs but there is no rejected connections on 55000 port that I set in Roon ARC settings.

The diagnostics (998) you’ve provided suggest that your Core is having difficulty reaching our servers. There are several independent factors that can cause this error, so we recommend double-checking the following to initiate troubleshooting:

  • Is your router firmware up to date?
  • Do you have any VPNs, proxy servers, or enterprise-grade security on this network?
  • Are you experiencing any issues with Roon Remotes, or other apps on your local network?

The second diagnostics (504) usually mean 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?
1 Like

Hi @Radoslaw_Kuczynski,

Did you have a chance to look into the questions our moderators helpfully posted above?

The tech support team is standing by to assist. We’ll keep an eye out for your response. Thank you!

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