# Roon ARC accessing Roon Core

**URL:** <https://community.roonlabs.com/t/roon-arc-accessing-roon-core/234188>\
**Category:** ARC: Port Forwarding Help\
**Created:** [February 15, 2023, 5:38pm UTC](https://community.roonlabs.com/t/roon-arc-accessing-roon-core/234188 "2023-02-15T17:38:11Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Christopher\_Newell](https://community.roonlabs.com/letter_avatar/christopher_newell/32/5_5575768a8748004e209b776fc1b2916d.png) [@Christopher\_Newell](https://community.roonlabs.com/u/Christopher_Newell)\
**Post date:** [February 15, 2023, 5:38pm UTC](https://community.roonlabs.com/t/roon-arc-accessing-roon-core/234188/1 "2023-02-15T17:38:11Z")

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### Roon Core Machine

macOS Monterey  
Version 12.6.3  
Processor 3.2 GH7 Quad-Core Intel Core i5  
Memory 16 GB 1867 MHz DDR3

### Networking Gear & Setup Details

Model  
Archer AX21  
MAC Address CO-06-C3-CA-03-B4

### Connected Audio Devices

iMac  
■■ POWERNODE2 B  
H61PN2807116 S/N (2016)

### Number of Tracks in Library

1,684 tracks

### Description of Issue

Diagnostics Data:

{  
“connectivity”: {“status”:“NetworkError”,“status\_code”:504,“error”:“error: Error: ETIMEDOUT, response code: undefined, body: undefined connected? undefined”},  
“external\_ip”: {“actual\_external\_ip”:“64.ddd.eee.fff”,“actual\_external\_ipv6”:“null”,“router\_external\_ip”:“100.aaa.bbb.ccc”},  
“status”: “status”: MultipleNatFound  
,  
“natpmp\_autoconfig”: {“status”:“NotFound”},  
“upnp\_autoconfig”: {“server\_ip”:“192.168.0.1”,“found\_upnp”:true}  
}

Screen shots:

 ![IMG_2972.PNG](https://roon-community-uploads.s3.amazonaws.com/original/3X/1/a/1af85f03430d26bd8ba9fb12978188ecc2dd925b.jpeg)  
 ![IMG_2969.PNG](https://roon-community-uploads.s3.amazonaws.com/original/3X/8/2/8278af0ed776845f114fa00575206d6c5693debf.jpeg)

---

<div class="post-metadata">

**Author:** ![Maarten\_Duits](https://community.roonlabs.com/user_avatar/community.roonlabs.com/maarten_duits/32/193085_2.png) [@Maarten\_Duits](https://community.roonlabs.com/u/Maarten_Duits)\
**Post date:** [February 16, 2023, 6:37am UTC](https://community.roonlabs.com/t/roon-arc-accessing-roon-core/234188/3 "2023-02-16T06:37:03Z")

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Hi @Christopher_Newell,

Welcome to the Roon Community.

> [@Christopher\_Newell](#):
>
> {“actual\_external\_ip”:“64.ddd.eee.fff”,“actual\_external\_ipv6”:“null”,“ **router\_external\_ip”:“100.aaa.bbb.ccc”** },

When i look at your error message, i see that your external router ip starts with **100**. The first thing that comes to my mind, is that your ISP has implemented CG-NAT.  
Please take a look at below website on what CG-NAT is and how you can check if it’s implemented.

[https://www.remoterig.com/wp/?page\_id=3494](https://www.remoterig.com/wp/?page_id=3494)

Kind regards,

Maarten.

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<div class="post-metadata">

**Author:** ![system](https://roon-community-uploads.s3.amazonaws.com/original/3X/d/e/deefbd9083c99c82bbf2dd3f873f52a49f5db881.png) [@system](https://community.roonlabs.com/u/system)\
**Post date:** [February 28, 2023, 5:31pm UTC](https://community.roonlabs.com/t/roon-arc-accessing-roon-core/234188/4 "2023-02-28T17:31:49Z")

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