Roon ARC unable to access Roon server (ref#0BX92U)

Network Setup

· I use a single personal router not provided by my ISP

ARC Status

· ARC is *Not Ready*

Roon Error Code

· None of these are listed. It simply says "TIMEDOUT" or similar.

System or third-party *firewalls *or *antivirus software* can sometimes block RoonServer from reaching ARC.

·
Try adding RoonServer and its associated processes to the whitelist of any firewalls or antivirus software you have installed, including the Windows system firewall, if applicable.
[You can learn more about firewall exceptions with Roon here.](https://help.roonlabs.com/portal/en/kb/articles/firewall)

Has the status in Roon -> Settings -> ARC changed after adding exceptions in your firewalls and antivirus software for Roon?
I don't have any system or third-party firewalls or antivirus software.

Have you successfully located and enabled the UPnP or NAT-PMP settings in your router's web UI?

· I've turned UPnP/ NAT-PMP on and ARC won't connect

Select the Diagnostic Keyword or Text String

· Something else

Don't give up yet.

· I'm stuck. I'd like to create a post to ask Roon Community for help.

Describe the issue

Roon ARC will not be able to access your Roon server

Describe your network setup

Comcast ISP. Netgear R7800 router. Windows 11 desktop. Used to connect. Then connect only over network. now won't connect at all. Uninstalled Roon and reinstalled. Router has UpnP enabled, and port forwarded to correct to correct desktop and port per Roon app. Here is diagnostic: {
"ipv4_connectivity": {"status":"NetworkError","status_code":526,"error":"error code: 526"},
"external_ip": {"actual_external_ip":"73.aaa.bbb.ccc","actual_external_ipv6":"null","router_external_ip":"null"},
"status": "status": MultipleNatFound
,
"natpmp_autoconfig": {"server_ip":"192.168.1.254","found_natpmp":true},
"upnp_autoconfig": {"server_ip":"192.168.1.254","found_upnp":true},
"multinat_autoconfig": {"status":"Failed","error":"Failed to get External IP Address from Router likely due to NAT-PMP implementation"}
}

This is currently a known issue, connected to the cloud problems that are mention in the blue banner at the top of the forum. Roon are aware and working on it. See the other threads about it, and the latest update on this:

Edit: fixed link, I meant this:

However, this error seems to only affect the ARC network test. If your ARC worked before, it still should (as confirmed by many other users)

Hi @Howard_S

As mentioned by Suedkiez, the Error 526 is currently a known display glitch resulting from some recent changes in our cloud infrastructure. It frequently reports a “Not Ready” status in Roon Settings even when ARC is actually fully functional.

Could you please disable Wi-Fi on your phone (forcing it to use cellular data) and try to play music in ARC?

If it plays, you can safely ignore the error message for now while we resolve the display issue on our end. If it fails to play over cellular data, please let us know, and we will investigate further.

We’re going to allow this thread to auto-close due to inactivity at this time. If you require additional troubleshooting or assistance, please reach out here in a new tech support request and our team will promptly reactivate the conversation. Thank you!