Confusion about Zyxel VMG3625-T50B / VMG8623-T50B Official Support (Using for WAN/Ethernet only, NO DSL)

Installing and Using OpenWrt
1

Hi everyone,

I recently bought a second-hand Zyxel VMG3625-T50B (which I believe is hardware-identical to the VMG8623-T50B) based on recommendations that it’s a great budget device for OpenWrt.

However, I am a bit confused about the current state of official support and need some guidance before the device arrives.(The device will be delivered to me in 3 days.)

Here is my situation:

The Setup: I do NOT use the DSL/VDSL modem feature. I receive my internet connection via an Ethernet cable from a neighbor. I will be connecting this cable directly to the WAN port of the Zyxel.

The Goal: My main priority is to install OpenWrt to use SQM (Cake) to fix bufferbloat for gaming and to set up DoH (DNS over HTTPS) for privacy.

The Confusion: When I search the official OpenWrt Firmware Selector, I have trouble finding a clear "Stable" release for this specific model, or I see conflicting information online stating it is "Not Supported" due to closed-source DSL drivers.

My Questions:

  • Since I will only be using the WAN port (Ethernet) and do not care about the DSL modem functionality, is there a reliable OpenWrt build I can install?

  • Should I be looking for a specific community build/snapshot, or is there an official image that works for the router part of the hardware?

  • Are there any specific installation steps I should be aware of for the VMG3625-T50B / VMG8623-T50B to avoid bricking it?

I am comfortable with Linux and SSH, so I don't mind a bit of tinkering, but I want to make sure I'm downloading the right file.

Thanks.

2

If you look at the device page for this family of devices, it explicitly says "NOT SUPPORTED YET"

Further, visit the firmware-selector and you will see that no builds exist (24.10.x or snapshot) for this product line.

So... the answer is fairly straight forward: you cannot install OpenWrt on your device. If you would like to contribute to the development process, you are welcome to do so. Otherwise, there are no indications that anyone is currently working to support this device.

3

Econet EN7516GT SoC won't make it easy to add device support.

4

Where did you get those recommendations?

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