ARC Port Forewarding with multiple routers

Roon Core Machine

NAS Synology 918

Networking Gear & Setup Details

H388X external router + Netgear Nighthawk MR60 internal router

  1. Who is your internet service provider?
    TIM Italy

  2. Please list the make and model of your modem and router?
    H388X external router + Netgear Nighthawk MR60 internal router

  3. Do you have any additional network hardware, like additional routers or managed switches?
    See above

  4. Does your network have any VPNs, proxy servers, or enterprise-grade security?

Connected Audio Devices

NAS Synology 918
NAIM Muso 2
iPhone ARC Roon

Description of Issue -

What is the exact port forwarding error message you see in the Roon Settings → ARC tab?

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

Hi @Marcello_Nadalini

Thank you for your patience while we’ve diligently worked to reach every request for support with port forwarding. 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:

Is your Modem configured in Bridge Mode so that it operates only as a modem or do you have the ports forwarded on both?


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