Issue with ARC and network connectivity (ref#WMHVMG)

Support ARC: Port Forwarding Help
3

I looks like you have two routers in your home network because, in the error text above, I can see three different subnets being referenced:

  1. 91.aaa.bbb.ccc - the WAN side subnet managed by your ISP
  2. 192.168.100.x - the LAN side subnet created by the router managing the ISP connection
  3. 192.168.0.x - the LAN side subnet created by the router to which your roon server is connected.

192.168.x.y addresses are non-routable (meaning they must be LAN addresses) and are usually configured with a 255.255.255.0 netmask - which means that the x value in 192.168.x.y is usually a subnet discriminator.

So, do you have a mesh wifi system in use or two routers for any other reason?

If so, you have three possibilities:

  1. Put the WiFi mesh routers (or second router if not a WiFi mesh system) into access point mode so that they do not perform routing and do not offer ip addresses through DHCP
  2. Put the router supplied by your ISP into a ‘modem only’ or bridge mode. Not always possible. Most often this applies to ISP’s using DOCSIS cable modem routers (Like Virgin Media in the UK).
  3. Create a port forwarding rule on the router that is connected to the internet to forward port 55000 to the second router.

The first two solutions are the prefered option because they elliminate one of the two subnets on your local network and make everything simpler. The third option can still lead to issues like: Roon Remotes connected to one router cannot connect to the Roon server on the other router.

You might find more detail in the conversation thread started by someone else with a very similar issue at:

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