New router Roon arc still not working

Roon Core Machine

Roon rock Nuc5i7RYH 16gb ram running roon 2.0 (build1311)

Networking Gear & Setup Details

tp-link AX3000 router, ethernet, no vpn

Connected Audio Devices

Pi 4b Ropieee (USB) ARC Refdac

Number of Tracks in Library

10500 tracks

Description of Issue

I got myself a new router with UPnP.
RoonMobile shows up under the UPnP client list.
NAT forwarding is active with the same port as Roon.
I get this:

Diagnostics data for roon support:
“ipv4_connectivity”: {“status”:“NetworkError”,“status_code”:504,“error”:“error: Error: ETIMEDOUT, response code: undefined, body: undefined connected? undefined”},
“external_ip”: {“actual_external_ip”:“31.ddd.eee.fff”,“actual_external_ipv6”:“null”,“router_external_ip”:“”},
“status”: “status”: MultipleNatFound
“natpmp_autoconfig”: {“status”:“NotFound”},
“upnp_autoconfig”: {“server_ip”:“”,“found_upnp”:true}

Good news: Your UPnP is working
Bad news: Your ISP is probably the cause of this MultipleNatFound problem. What is your ISP?


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Thanks for helping!
It explains why turning router firewall completely of didn’t help.
My ISP is Bredband2.

They are using CG-NAT by default but it should be possible to take you off that and switch you to a real IPv4 address. See this post and the other posts linked from there:

In particular the last one:

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