ARC / Qnap 251+ / Apple AirPort Express

I am using Qnap 251+ as a Core connected to Apple Airport Express by network cable.

Apple Airport Express is connected to the local network in the building and works in bridge mode. I believe it is a problem why ARC can’t connect to my core.

Any idea how to use this configuration from outside by ARC

This is diagnostic:

“connectivity”: {“status”:“NetworkError”,“status_code”:504,“error”:“error: Error: ETIMEDOUT, response code: undefined, body: undefined connected? undefined”},
“external_ip”: {“actual_external_ip”:“”,“router_external_ip”:“null”},
“natpmp_autoconfig”: {“status”:“NotFound”},
“upnp_autoconfig”: {“status”:“NotFound”}

Hi @Aleksandar_M,

Did you ever see a change in your situation? Did you ever set up port forwarding on your Airport setup? Below is our article for port forwarding help for reference.


The whole thing is farcical (ARC)including the comments how would anyone remember how AirPort Express was originally setup I did mine in 2012 the last year of AirPort Express

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