@Decorer247 

Hello, 🫡

To begin with, I wouldn’t recommend going with the Deco X20 in router mode because this issue is known as double NAT.

Cons: There are quite a few, and I'll list some for you:

1. Issues with online gaming and P2P applications: A double NAT can cause latency and make it difficult to connect to game servers or other players. Additionally, it may limit access to features like voice chat and party chat on consoles, such as on the PS5..
2. Reduced network performance: Since there are two devices translating IP addresses, latency and response times may be affected.
3. Connectivity problems with smart devices and IoT: In networks with multiple smart devices, these devices might struggle to connect properly to the internet or to each other, especially if they need to communicate over the internet.
4. Difficulty with port forwarding: If you want to set up port forwarding for a device on your network, double NAT complicates the process because you’ll need to configure it on both NAT devices.
5. Challenges with external services access: In some cases, VPN services or remote access applications may not work correctly or may require additional configuration.

You probably don’t want this, so most ISPs offer an ONT in bridge mode upon request, which essentially only “translates/convert” the signal from the fiber optic cable, allowing you to use your own networking equipment to avoid the issues mentioned above.

If your ISP only allows their equipment, you can still use the Deco system in access point mode… unfortunately. You can definitely try setting them in router mode, but from there, you’ll see the results yourself 😅.