ISPs and Routers: List of Known Solutions and Workarounds

Routers and ISPs

General Router Instructions

North America ISP-Specific Hardware

Europe ISP-Specific Hardware

Known Carrier-Grade NAT Issues Requiring Workaround or #tinkering

This is a list of internet service providers known to have innavigable carrier-grade NAT implementation at this time. If you are having difficulty with port forwarding and your ISP is listed below, please first review our Help Center guide to verify there isn’t a resolvable issue in your local network setup; these CG-NAT blockages do not necessarily apply to every user. Note that Roon CG-NAT is a known snag with the initial design of ARC that will unfortunately force some customers to pursue workarounds, but the team is actively researching methods to hopefully more widely democratize access to on-the-go playback for Roon 2.0 users at some point in the future.

Please see the staff post in each case below for additional context.

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ARC can not connect to Roon Core (Orbi)
ASUS RT-AX88U Port Forwarding Not Automatically Configuring, Timeouts
ARC Connection Problem
About the ARC: Port Forwarding Resources category
Vodafone Italy w/ Vodafone Power Station: Port Forwarding Required Manual Configuration
Port Forwarding on Mikrotik router to support ARC
Synology Core Port forwarding setup issues
Roon ARC - Multiple NAT error
ROON ARC unable to access my Roon core
Roon ARC and TP Link M4-CG-NAT Issue, Tailscale Setup Request
Tips for Virgin Media & Deco Mesh (UK) - Roon Arc
Roon ARC connectivity issue with Unifi
Port Forwarding problem with Roon ARC
3 UK Mobile Broadband - Carrier-Grade NAT Appears to Block Port Forwarding
Struggling with Port Forwarding for Roon ARC
Eeero Issue: Roon Arc is “unable to securely access Roon Core”
On ARC I get the following error, how to solve it?
ARC not connecting to core on mobile
ARC: Either no access to UPnP (Bridge mode) OR Multiple NAT problem
ARC won't connect
My ROCK can not configure access for ARC
Port forwarding preventing Roon Core to ARC access
Roon Arc Not Ready error
T-Mobile (US) 5G Home Internet: CG-NAT Blocks ARC, Workarounds Required [Ticket In]
Arc Not Configuring with Synology RT2600ac
Arc port-forwarding solution: ATT BGW320 and Asus AX-88U
Roon ARC not syncing with Roon Server (ref#E3WE4I)
Roon arc stopped connecting
Roon Build 1400+ : Issues with Airplay Connection to Certain Endpoints [Resolved with Build 1413]
Network Connectivity Issues and Multiple NAT Found (ref#RJNSVT)
ARC unable to access Roon server (ref#MLHWLL)
Issue connecting Roon Arc with T-Mobile router and Orbi mesh routers (ref#ASVW7G)
Network Error 504 and Multiple NAT Found in Roon Status (ref#1ARJQ4)
Issue with Roon ARC unable to securely access Roon Server (ref#IJMLYY)
ARC unable to connect after no changes in home network setup (ref#9SSR12)
ARC Not Recognized in Roon App when Away from Home (ref#CPMGHM)
Cannot connect Roon ARC due to NetworkError with ETIMEDOUT (ref#WPW3V3)
ARC unable to connect to Roon Server on Nucleus despite being up to date (ref#SNL3D1)
Unable to use Roon ARC outside (ref#WMFCW3)
Inability to access Roon ARC (ref#CDQD1P)
Network Error 504 with Multiple NAT Detected (ref#NOWVLL)
Upgraded Ubiquiti Dream to Dream 7 no ARC won't work
Roon ARC unable to connect securely despite port forwarding (ref#LHHEUL)
Roon ARC can't access Roon Core (Sky Cable)
Arc help needed
ARC Multiple NAT Issue
Roon ARC reports poor connection
ARC connectivity issues with TPlink MR6400 4G router
I can't get Roon Arc, Roon Remote or Web Display to work
Roon 2.0 not ready for prime time?
Wightham Telecom: CG-NAT Blocks Port Forwarding w/out Requesting Static IP for Fee [See Staff Post]
Roon Arc connection failure
Linksys MR9000v1 and port forwarding for ARC to work
Roon ARC : Can I use Forward Port form DDNS?
Issue Connecting Via ARC
Port Forwarding Issue, Manual Configuration, Linksys
Unable to connect to roon core on NAS remotely via ARC
Problem with Roon ARC
ARC Set-up -- Bewildering!
Brilliant Roon Arc (My Dream come true)
ARC Error Messages And Solution Suggestions
Cannot get ARC to work in my car
ARC - double NAT on Google Wifi - Bridge mode enabled on modem
Roon Arc is not connecting
ARC Setup - Google Wifi over FIOS
Arc error code when trying to enable in room settings
Unable to connect via ARC after moving core to Ubuntu
ARC not connecting to Roon Core
ARC not connecting after change to ROCK
ARC can't connect to Core (modem Huawei HG8145V5)
Can’t get connection with ARC
Can't get Nucleus configured to run ARC
Having problems with ARC router config
ARC not connecting to ROON core Synology NAS
Get ARC to work with Huawai HG8247U
ARC not working with my system
ARC just doesnt want to work for me outside the house
Cannot seem to get ARC working
Can someone help me with Roon ARC setup?
Roon ARC Unable to Securely Access my Roon Core
Unable to access your Roon Core (ARC)
FRance: Free 5G Zyxel 5101 and Linksys Router: Impoosoble to connect ARC
FRance: Free 5G Zyxel 5101 and Linksys Router: Impoosoble to connect ARC
Cannot connect to Roon ARC
ARC Connection Problem HELP required!
ARC MultipleNAT Suddenly When Port Forwarding Previously Worked (Sweden, Tele2)
Roon Arc shows error for connection
[SkySat CG-NAT] Roon Arc unable with Satellite Internet?
Roon Arc doesn't work with Swisscom Internet Box and 5G Internet Booster
Cannot connect with ARC
ARC configuration help
UPnP enabled with port forwarding, but "Roon ARC was unable to securely access your Roon Core"
Roon ARC cannot connect to Core, Synology router
Roon ARC error message
Network Error Timeout with IPv6 and IPv4 (ref#74ER1I)
request Help with setting up Port Forwarding for Roon Arc
Help with double Nat arc issue
Arc have connection issue under LAN
Another ARC to Core Issue
Roon ARC not working - MultipleNatFound
Issue with Network Connectivity and Multiple NAT identified (ref#2QERM3)
ARC stopped connecting suddenly. Was working fine a day or two ago
Somebody speak spanish?
Roon ARC NO WORK
Roon Arc will not connect - Using Syn. Nas and Netgear Orbi
Roon Core connection support
Can't set up ARC without error
Roon Core cannot be accessed by Roon ARC via AVM Fritz!Box
No outside connection to arc
Roon remote cannot find core on laptop, ETIMEDOUT error, MultipleNatFound status (ref#WXWL8F)
I need help getting Roon ARC working
Roon ARC connection test is failing
Roon ARC setting not able to connect to Roon Core
Arc not working Fritzbox Luxembourg