Arc Setup Network Error with Error Code 504 (ref#CGDGQK)

Support
1

Hi! What’s not quite right with Roon?

· Can’t reach my Server, remotes or ARC

Can’t connect to my Server, remotes or ARC

· Other ARC issues

Tell us what's going on

· Please assist in setting up Arc, was previously working.Copied from Settings Arc "{
"ipv4_connectivity": {"status":"NetworkError","status_code":504,"error":"error code: 504
"},
"external_ip": {"actual_external_ip":"103.aaa.bbb.ccc","actual_external_ipv6":"null","router_external_ip":"null"},
"natpmp_autoconfig": {"status":"NotFound"},
"upnp_autoconfig": {"server_ip":"192.168.1.1","found_upnp":true,"error":"s:ClientUPnPError501ActionFailed"},
"multinat_autoconfig": {"status":"Failed","error":"Unknown Error code"}
}"

Tell us about your home network

· Orbi 825

2

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 RoonServer
  • 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 reply 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?
3

Hi @duomono,

Thank you for your post.

ARC requires your home network to have either port forwarding or Tailscale configured. This is to navigate Network Address Translation, imposed in layers by each active router in your network.

Roon relies on a service in your router called UPnP to automatically configure port forwarding, but it couldn’t detect an active UPnP service in your router.

You need to first try to enable UPnP, and if that doesn’t work, you’ll need to configure a manual port forwarding rule. These will be in your router settings administration page.

Here’s a guide you can use.

If you have two routers, or if your network service provider has implemented their own network address translation (CG-NAT), then we’ll need to take a few extra steps. For now, please try the steps suggested in the post and article shared above.

We’ll proceed from there. Thank you!

4

If it worked before and you didn’t change anything, it’s possible that your router simply ran into a bug and its UPnP service is unresponsive. First try simply shutting down everything (router, switches, computers running Roon), then first restart your router and wait until it’s fully back up, then start your switches and then the Roon machines (starting with the server). Maybe that’s all that’s needed.

5

Hi @duomono,

If this problem is still ongoing for you, please verify if a background firmware update to the router default either your UPnP or port forwarding settings.

An additional quick test: change the port number in Roon Settings → ARC to a nearby integer, like 55600 instead of 55000.

Please share the current diagnostic you see in Roon Settings → ARC as well.

We’ll watch for your reply. This thread will auto-close without any new responses in the next several days. Thank you!

6

This thread is auto-closing due to inactivity. Please reach out here if you require additional support, and our team will promptly reopen the case. Thank you!