Unable to connect to Roon ARC with network error and NAT issues (ref#D7V4HR)

[ppmalec]

What’s happening?

· I'm having trouble with Roon ARC

What best describes your issue with ARC

· Other

How can we help?

· None of the above

Other options

· Other

Describe the issue

Issue trying to connect to Roon ARC, getting this error message

{
"ipv4_connectivity": {"status":"NetworkError","status_code":504,"error":"error: Error: ETIMEDOUT, response code: undefined, body: undefined connected? undefined"},
"external_ip": {"actual_external_ip":"184.aaa.bbb.ccc","actual_external_ipv6":"null","router_external_ip":"192.168.2.11"},
"status": "status": MultipleNatFound
,
"natpmp_autoconfig": {"status":"NotFound"},
"upnp_autoconfig": {"server_ip":"192.168.50.1","found_upnp":true}
}


I have an ASUS Router GT-BE98 Pro, I've enabled upnp. I have a Mac mini 4 running the Roon Server. Ive disabled all the firewalls on the router and Mac mini 4. I have ran testing through DMZ and also tried the port forwarding. Still not working.

Describe your network setup

Asus Router GT-BE98 Pro and Mac mini 4

[Wade_Oram]

You have two subnets in your local network: 192.168.2.0/24 and 192.168.50.0/24.

This means that you have two routers in your network - presumably you have connected your Asus GT-BE98 Pro to and ISP supplied router or modem/router.

I helped someone else with the same issue just recently. You can find my reply at:

Network Error and Multiple NAT Found in Connectivity Issue (ref#45EBS8)

MultipleNatFound, as seen in the quoted diagnostic text above, means that either you have got two (or more) routers in your network between the Roon Server machine and the ISP or your ISP uses CG-NAT or both. In the diagnostic text, I can see ip addresses mentioned in two separate private subnets (192.168.178.25 and 192.168.68.1) which tells me that you actually have two devices offering router functionality in you home network. This means that the Fritzbox is not the only router in your home. …

[benjamin]

Hey @ppmalec,

Thanks for writing in and welcome to the Roon community!

@Wade_Oram is correct - your issue is related to the "status": MultipleNatFound section of the error code above.

You’ll either want to disable your second local subnet, or set your second router into bridge mode if possible. Let us know if the thread linked above is helpful!

@ppmalec

I have ran testing through DMZ

This can be risky in regard to your network security, and we advise against using DMZ.

[Wade_Oram]

I don’t think that putting the Asus router in the DMZ of the ISP router significantly compromises network security. It is just delegating security to the Asus router.

However, the DMZ is basically just a catch all port forward. Thus, irrespective of whether you use a proper explicit manual port forward on the ISP router or put the second router in the DMZ of the ISP router, you will need to use a manual port forward rule on the Asus router. uPnP will not work in either case (it should configure the port forwarding on the Asus router OK but the external ip address check that it will perform afterwards will fail so the Roon Server will still report ‘NotReady’).

Putting the ISP router into bridge mode (or modem only mode) will stop it acting as a router and should allow uPnP on the Asus router to work (unless CG-NAT is also present ).

Also, if your ISP router is connected to an ONT by ethernet, you may be able to remove it altogether if you can determine how to connect a third party router to your ISP service. My BT service in the UK uses PPPoE so I can (and have) removed the ISP router and replaced it with my ASUS using the PPPoE settings (login, password). Some ISP’s may also need a vlan id.

[connor]

Hi @ppmalec,

Since you have a MacOS RoonServer, you can also bypass port forwarding entirely by installing Tailscale on your Mac and phone.

Many users with your network topology prefer Tailscale for its simplicity and flexibility. It’s often easier to set up - and a more permanent solution - than an open port configuration.

See here for specific instructions:

Tailscale Setup Instructions: MacOS RoonServer