I also live in Australia and had Aussie Broadband as my service provider, the only way I could get my RT-AC88U working with ARC was to to either pay for a Static IP, which I firstly did, then I read that you can opt out of CG-NAT, so I then did that and ARC worked and I don’t need to pay for a Static IP.
Hmmm…I dowloaded ARC and I can download files and play music (only on the phone of course) but Roon still tells me it cannot connect ARC. Is this because I am on my own wi-fi network? I’m going out tomorrow and will see if I can remote get in. Is it odd that the ARC works even though Roon says it can’t connect? @Roon_2.0_ARC_Support
The modem in front of your router is also doing NAT or
Your provider may be doing CGNAT
The best solution for 1 is to see if your provider can put their modem in bridge mode.
The best solution for 2 is to see if your provider can give you a public facing IP address, usually at an extra monthly charge.
Another option for 1 is to disable DHCP and NAT on your router and let your internet provider’s router do that. You then have to get the port forwarding working on their router. Or put your router into access point mode only and then again get your provider’s router port forwarding working.
Adding my voice to the CGNAT users who can’t use ARC. I’ve contacted my supplier in the UK (Community Fibre). They have told me they only give public IP’s to business customers (£150pm minimum). I’m waiting for them to contact me with an offer!
I understand there are services which can be used to get a public ip via VPN. At the moment I’m looking at those options. If anyone in the UK has this kind of setup (preferably with a unifi USG3!) I would be really interested to hear ho wit works for them.
I was having exactly the same issue. It turns out it wasn’t the router’s settings, but the firewall on my QNAP. I added an exception to allow my specified Roon port (5500*) and all is working well now (actually even though I had an error in the Roon Arc config, the mobile app seemed to be communicating fine).
I hope this helps some of you!
Thanks for this post, it helped me to solve my arc setup issues.
I had a virgin media hub acting in router mode, with an asus zen wifi connected to it, and my roon is then connected to the asus via some switch boxes.
UPnP was disabled on the virgin media hub.
Setting up a port forwarding rule on the Asus router did not initially work.
But, as suggested by Axel_Lesch, setting up a port forwarding rule on the virgin media hub to forward to the asus router did the job.
Thanks for following up, @Wes, and also to all who have contributed suggestions. I’ve been tied up with other things so am still where I was – ie, ARC is not working. I did try to resolve things but that was a while ago now. The error message Roon is throwing is:
I ended up resorting to the support forum and have managed to get Roon ARC working. I’ve summarised all the key settings (or, at least, the ones that seemed to be key to me) in this thread. I hope you might find it helpful.