Possible issues? At least that's a guess.
Possible issues? At least that's a guess.
Hi there! I'm a newbie with networking. You're using an ISP-provided modem with four Ethernet ports at the back. When you connect your Asus RT-AC86U router to one of those ports, it shows a WAN IP address, but you can't set up a DDNS service because of how the modem handles NAT. You've tried placing the router's IP in the modem's DMZ, but it didn't help. The router warned that it might be using private WAN and possibly a multi-NAT setup, which blocks DDNS.
You mentioned you could get an aftermarket modem easily, since the ISP one is relatively simple to configure. That sounds like a good path forward. For a replacement, I'd recommend looking into models with better support for advanced NAT handling and DDNS compatibility—something like the Asus RT-AX86U or even the newer ASUS RT-AX88U if you're open to it.
If you're okay with an aftermarket option, I can help you pick one that fits your needs. Also, your interest in the RT-AC86U is understandable, but the newer models often offer better performance and features. Let me know what you think!
You're dealing with a mix of ISP router, network setup, and DNS considerations. It seems the Asus router is configured with a dynamic DNS client, but it's also nat'ed, which can be tricky. Double NAT might be complicating things—try getting just a modem from your ISP instead. Meanwhile, your DynDNS client likely needs the external WAN address, though you're polling the interface, which isn't ideal. For the second point, I'm not sure—I’m a bit concerned about consumer firewalls.
You mean to test the functionality by running the application locally on your own machine. Try it on your desktop or server to check if it operates as expected.
I wasn't referring to link aggregation for fixing my NAT issues. It was merely another item on my list. I still don’t understand you. The issue is that my connection passes through my ISP modem, which is why I’m considering a replacement. Thanks for your responses.
I understand the challenge with the language gap. However, you might not need to disregard the router.
I didn’t mention anything about resolving your NAT problem. Link Aggregation doesn’t seem useful for you at the moment.