Roon ARC connectivity issue with Google Mesh and Xfinity modem (ref#U8WFF8)

[Shankar_Rathnam]

Network Setup

· Do you have a mesh network? (Google Mesh, Eeros, Ubiquiti, etc.)

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

I have a Xfinity modem feeding a Google mesh router. Cannot get ARC to work. I get this error message. {
"ipv4_connectivity": {"status":"NetworkError","status_code":504,"error":"error code: 504"},
"external_ip": {"actual_external_ip":"73.aaa.bbb.ccc","actual_external_ipv6":"null","router_external_ip":"null"},
"natpmp_autoconfig": {"server_ip":"xxx.yyy.xx.1","found_natpmp":true},
"upnp_autoconfig": {"status":"NotFound"},
"multinat_autoconfig": {"status":"Failed","error":"Control URL not found in Device Description Document"}
}. No matter what I do I cannot connect through Roon ARC

Describe your network setup

Xfinity modem to Google mesh. Hard wired to roon server.

[connor]

Hi @Shankar_Rathnam,

Thank you for your post. Put simply, you have two routers active on this network, and RoonServer can’t automatically configure a port forwarding rule with one or both of them. This is a double-NAT scenario. Xfinitiy hasn’t commonly implemented carrier-grade NAT, so this double-NAT is likely at the level of your own network.

More specifically, this message indicates that UPnP (the service built into your router with which RoonServer negotiates a port forwarding rule) is not available or configured.

Try placing the Xfinity router in Bridge mode and relying only on the Google router:

Use Bridge Mode on your wireless gateway

Alternatively, you can follow these steps to create a manual port forwarding rule in both routers. This rule needs to be identical in the settings interface for both the Google and Xfinity routers.

ARC Port Forwarding

Let us know if this helps. Thank you!

[Shankar_Rathnam]

that worked, thank you.