What also could be an issue is of your ISP have implemented residential-tier carrier-grade network address translation, or CG-NAT. What this means is that the router’s external IP address is being translated by your ISP before it is reported to ARC, so port forwarding will not configure.
To check if your ISP is using CG-NAT see below instruction (i found it on the web)
When you are up and in connection with the Internet and can browse the web go to
or any similar page which will show from which public IP address your request is coming. This address is always a public IP-address, nothing else works.
After that, login to your router and look at the status page. The router will report which WAN IP-address it has got from the ISP.
If it shows the same IP-address as whatsmyip than your ISP isn’t using CG-NAT.
If the router shows another WAN IP-address it’s NOT OK, the ISP is using CG-NAT.
If CGN is in use the router often shows a WAN IP address like 100.xxx.xxx.xxx or 10.xxx.xxx.xxx.or 192.xxx.xxx.xxx.
When looking at your port forwarding rule, the thing what is different from my rule (different router), is that i needed to enter for which ip-address this rule applies (the ip-address of the roon core). I don’t see it in your screenshot.
I’m sorry to tell you, that i can’t help you any further. I hope @support can assist you.
When i look at it, it looks fine to me. There is one thing I remember that I read somewhere in this forum that some ISP’s “ reserve” ports so you can’t use them. Could you change port number 55000 in the Roon Arc Setting screen to ie. 44135. Also change port number 55000 in the port forwarding rule.
Do you have the option to turn off UPnP in the router? If so, try to switch it off.
I’m at home so I could connect to the Roon on my home network. but the Roon app on the Mac mini says it is securely accessible. and the ARC app on my phone says it’s connected and playing music. I’ll have to get off the home network and make sure that it still plays. this is excellent. thank you. I also did turn OFF UPnP and just went with fixed port forwarding. I’ll have to see if turning off UPnP screws up anything else. I only have one other service that I use that wants to connect to my home network. I’ll have to see.