Roon ARC app shows "Not Ready" status (ref#XMD272)

Support
1

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?
ARC is still *Not Ready*

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 shows "Not Ready"

Describe your network setup

ISP = Cox (USA)
Network = Unifi (UDMP) + Unifi switch. Linked via Cat6a.
Note: upnp enabled and port forwarding for roon server setup.
roon server: mac Mini M4 running Tahoe 26.5.1 (firewall not enabled)

Diagnostics data:
{
"ipv4_connectivity": {"status":"NetworkError","status_code":504,"error":"error code: 504
"},
"external_ip": {"actual_external_ip":"72.aaa.ddd.eee","actual_external_ipv6":"null","router_external_ip":"null"},
"natpmp_autoconfig": {"status":"NotFound"},
"upnp_autoconfig": {"server_ip":"192.168.1.1","found_upnp":true,"error":"doaction request return statuscode: UnknownError"},
"multinat_autoconfig": {"status":"Failed","error":"Unknown Error code"}
}


Thanks in advance for any guidance on resolving this.

10

Hello @Akimo,

Thank you for the detailed diagnostics. The key issue here is that UPnP on your Unifi Dream Machine Pro is returning an error and not completing the port mapping.

The recommended approach is to disable UPnP and set up manual port forwarding instead:

  1. In Roon, go to Settings → Roon ARC and note the port number shown (e.g. 55002)
  2. In your UniFi Network console, go to Settings → Firewall & Security → Port Forwarding
  3. Create a new rule:
  • Name: Roon ARC
  • Protocol: TCP
  • External port: the port from Roon ARC settings
  • Internal IP: your Mac Mini’s local IP
  • Internal port: same port number
  1. Make sure your Mac Mini has a DHCP reservation in UniFi so its IP does not change
  2. In Roon ARC settings, disable “Automatically configure my router” and enter the port manually

After setting this up, run the connectivity test in Roon ARC settings and let us know the result.

11

Vadim,

Thanks for the response (and the help you’ve given me in the past).

I already had port forwarding set up as you detailed, but noticed that I still had uPnP enabled, so I disabled that and tried accessing the “roon ARC” section in roon settings again. Here is the diagnostics info:

{
“ipv4_connectivity”: {“status”:“NetworkError”,“status_code”:504,“error”:“error code: 504\n”},
“external_ip”: {“actual_external_ip”:“72.aaa.ddd.eee”,“actual_external_ipv6”:“null”,“router_external_ip”:“null”},
“natpmp_autoconfig”: {“status”:“NotFound”},
“upnp_autoconfig”: {“server_ip”:“192.168.1.1”,“found_upnp”:true,“error”:“doaction request return statuscode: UnknownError”},
“multinat_autoconfig”: {“status”:“Failed”,“error”:“Network Trace Failed”}
}

It looks slightly different to me, but beyond my ability to interpret.

12

Hi @Akimo,

Just to clarify, have you created the manual port forwarding rule in the Cox modem/router or the Unifi router? The latest error message still shows a router at 192.168.1.1 advertising a UPnP service, so Roon is unable to rely on the manual rule.

13

Connor,

Thanks very much for the troubleshooting. I checked my Unifi WAN settings, and it appears that I have UPnP disabled. I’m going to PM you a screenshot of my WAN settings and my port forwarding rule just to make sure I am not missing something basic.

15

Hello @Akimo

Thank you for providing the screenshot of your router settings. Looking at the configuration, I can see exactly why the connection is failing.

The issue is with the external port assignment. Currently, your WAN Port is set to 9, but the Forward Port is set to 55000. For Roon ARC to successfully communicate with your Roon Core, the external port listening on the router must match the internal port.

Please adjust your port forwarding rule to the following settings:

  • WAN Port: Change this from 9 to 55000
  • Forward Port: Leave as 55000
  • Protocol: Change to TCP/UDP
  • Forward IP Address: Leave as 192.168.1.42

Once you have updated the WAN Port to 55000 and saved the changes in your router, please head back to Settings → Roon ARC in the Roon app and re-run the connection test. It should now pass successfully!

16

Vadim,

It is now working!

Thanks so much, and sorry to have wasted your efforts on something so basic.