Struggling with Port Forwarding for Roon ARC

[Rebecca_Connolly]

Roon Core Machine

MS Windows 11 Pro
5900X CPU // Hero VIII 570 mobo // 2 x 2TB SSD, 1 x 6TD HDD // 32gb 3600 RAM // 6900XT

Networking Gear & Setup Details

• ISP provided crappy router modem (no bridge mode) connected Zen Wifi AX WiFi Mesh x 2 (the main one is connected wired to the ISP router/modem
• PC is connected wired to Zen Wifi unit
• PC is my Roon Core
• I have a VPN but it’s only on occasionally
• The ISP provided router has no firewall or anything
• the Zen WiFi ones I have no idea about security

Description of Issue

I’m a neophyte with networking and it took me ages just to set up the two Zen WiFi units I have so please forgive my stupidity here.

I’m trying to set up Roon ARC so I can listen to my music when I’m outside the home but it’s not working and giving the following error (I’ve removed the IP addresses and replaced them with X):

{
“connectivity”: {“status”:“NetworkError”,“status_code”:504,“error”:“error: Error: ETIMEDOUT, response code: undefined, body: undefined connected? undefined”},
“external_ip”: {“actual_external_ip”:“91.ddd.eee.fff”,“actual_external_ipv6”:“null”,“router_external_ip”:“XXXXX”},
“status”: MultipleNatFound
,
“natpmp_autoconfig”: {“status”:“NotFound”},
“upnp_autoconfig”: {“server_ip”:“XXXXXXXX”,“found_upnp”:true}
}

I have looked on support and the Asus router setup information but still unable to get it to work and I think it’s my general lack of understanding this stuff - is anyone who’s good with this able to explain to me like I’m 5 how to do it?

Thank you

[Suedkiez (Just a fellow user like you)]

@Rebecca_Connolly

“status”: MultipleNatFound

This is the problem.

There is more than one network address translation (NAT) layer active, preventing port forwarding from working although the port forwarding on the router is configured by UPnP.

I’m copying Roon support’s standard response for the MultipleNatFound issue, with some of my comments in brackets:

MultipleNatFound can occur either at the local-network level (commonly as a result of two routers), or at the level of your service provider (in the form of carrier-grade NAT). [Or it could be both at the same time]

If your setup involves an ISP-provided gateway (modem/router combination) and your own third-party router:

• In the web administration interface of the ISP-provided gateway (modem/router combination), enable Bridge Mode or equivalent, where the ISP-provided gateway does not have DHCP routing enabled.
• Alternatively, if you have already created a manual port forwarding rule in your 3rd party router, you can add an additional rule to forward the port through the ISP/second router. [I.e., on the ISP modem/router, create a rule to forward the port from the external IP address to the second router’s local IP address. On the second router, create a rule to forward the port onward to the Roon Core’s IP address]

If you only have one router in your setup or your modem is already in Bridge mode, please take a look through our list of known router and internet service provider solutions, as other users may have already encountered the same situation: ISPs and Routers: List of Known Solutions and Workarounds

You can reach out directly to your service provider to ask if they support port forwarding; this question will often enough to prompt them to explain whether or not the carrier-grade NAT they’ve implemented can function with ARC.

More specifically, you can pass along the following questions:

• Have you implemented carrier-grade NAT for my account level?
• Have you fully implemented IPv6, or do you have IPv4 addresses available?
• Can I request a static IPv4 address to support port forwarding? [If the support people are clueless: Every online gamer needs the same thing, e.g. for a PlayStation]
• Are there any ports you have reserved at the ISP level I should be aware of?

If you’re unable to locate an existing solution in our ARC: Port Forwarding Resources subcategory, please reach out to the Roon support team 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?

[Rebecca_Connolly]

Thank you so much for this - my ISP router is modem/router combined but does not support bridge mode. Am I going to have to buy a modem only that my 3rd party router can connect to?

[Suedkiez (Just a fellow user like you)]

In this case you may be able to do this:

you can add an additional rule to forward the port through the ISP/second router.

[I.e., on the ISP modem/router, create a rule to forward the port from the external IP address to the second router’s local IP address. On the second router, create a rule to forward the port onward to the Roon Core’s IP address]

[Rebecca_Connolly]

Hi all, so I’m still having problems with this. I’m going to try and be more indepth. I have a new PlusNet modem/router (a Hub 2) which is in Bridge Mode and connected from a LAN port to the WAN port of my AX6600 Asus Zen Wifi which is a main router (Asus 1) and connects via mesh Wifi to another AX6600 (Asus 2).

Internet and everything works perfectly well. I had to enter my ISP username and password on the Asus setup and is connected PPPoE.

All grand so far.

When testing the Roon ARC on the Windows 11 Roon app it shows a Roon Core IP as 192.168.50.114 with the port 55002. I’m not getting any error message or anything - it just spins with “testing” the entire time.

My Asus Router info is as:

This is the info on my WAN bit:

The port forwarding I’m trying to set up is here:

If I look at the settings on Asus 1 it also shows an IP of 192.168.50.0
If I look at the settings on Asus 2 it shows its IP as 192.168.50.210

Anyone able to tell me what numbers to put where?!