ARC error：502

[Freddy_Liu]

Roon Server Machine

Synology DS224+

Networking Gear & Setup Details

Netgear RAX80, Ethernet

1. Who is your internet service provider?
   Chinaunicom

2. Please list the make and model of your modem and router?
   ZTE ZXHN F4610U

3. Do you have any additional network hardware, like additional routers or managed switches?

4. Does your network have any VPNs, proxy servers, or enterprise-grade security?
   proxy servers on Apple TV

Connected Audio Devices

Description of Issue -

What is the exact port forwarding error message you see in the Roon Settings → ARC tab?

ROON ARC error:

{
“ipv4_connectivity”: {“status”:“NetworkError”,“status_code”:502,“error”:“error: Error: connect ECONNREFUSED 111.lll.mmm.nnn:55002, response code: undefined, body: undefined”},
“external_ip”: {“actual_external_ip”:“111.lll.mmm.nnn”,“actual_external_ipv6”:“null”,“router_external_ip”:“null”},
“natpmp_autoconfig”: {“status”:“NotFound”},
“upnp_autoconfig”: {“status”:“NotFound”}
}

[Rugby (aka Daniel or Big Dan)]

Hi Freddy,

Welcome to the forums.

The diagnostics (Error 502 ECONNREFUSED), you’ve provided suggest that UPnP is not properly configured on your router.

Please first try the following steps:

• Try to enable UPnP/NATPMP in the web administration interface for the router directly upstream from your RoonServer
• Try to manually open the port in your router’s port forwarding configuration
• Make sure the IP/Port matches the Port listed in Roon → Settings → ARC
• Check for any VPNs or Firewalls that might be interfering
• Check if your modem is in Bridge mode

If you continue to experience difficulties, please tag the 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?

[connor]

Hi @Freddy_Liu,

Please see the above response from a helpful and knowledgeable moderator.

You’ll need to first activate UPnP or create a manual port forwarding rule in your router’s web administration page. If you receive a different diagnostic message after subsequent tries, please post it here.