ASUS 4G-AX56 OpenWrt Firmware

CPU: MediaTek MT7621AT
RAM: 512 MB
Flash: 128NAND MB

The ASUS 4G-AX56 is supported by OpenWrt on the ramips/mt7621 target. 3 firmware images are available from the official OpenWrt 25.12.5 stable release — download one below, or build a custom OpenWrt image for this device with your own package selection.

Specs

Specifications

CPU	MediaTek MT7621AT
CPU cores	2
CPU frequency	880 MHz
RAM	512 MB
Flash	128NAND MB
1 Gbit Ethernet ports	5
WLAN hardware	MediaTek MT7905, MediaTek MT7975
Switch	MediaTek MT7530

Hardware data from the OpenWrt Table of Hardware; verify against your unit before flashing.

Build matrix

Supported firmware versions

Distribution	Version	Target	Profile
OpenWrt	25.12.5	ramips/mt7621	asus_4g-ax56

Downloads

Download images

OpenWrt 25.12.5 · ramips/mt7621

Image	Type	sha256
openwrt-25.12.5-ramips-mt7621-asus_4g-ax56-squashfs-factory.bin For first-time flash from stock firmware.	factory	b18105e0194a…
openwrt-25.12.5-ramips-mt7621-asus_4g-ax56-squashfs-sysupgrade.bin Not sure? Pick this if upgrading from OpenWrt.	sysupgrade	af70bf3ac6b9…
openwrt-25.12.5-ramips-mt7621-asus_4g-ax56-initramfs-kernel.bin Minimal kernel image, useful for first install or recovery.	kernel	f4aa33c5b5d8…

Downloads are served by the official OpenWrt mirrors — unchanged upstream stable builds.

Packages & install

Default packages & installation

Default packages

Every image for the ASUS 4G-AX56 ships these packages by default. The customize option below lets you add or remove packages before the image is assembled.

Device packages (4)

kmod-mt7915-firmware kmod-usb3 kmod-usb-serial-option kmod-usb-net-cdc-ncm

Target default packages (29)

apk-mbedtls base-files ca-bundle dnsmasq dropbear firewall4 fstools kmod-crypto-hw-eip93 kmod-gpio-button-hotplug kmod-leds-gpio kmod-nft-offload libc libgcc libustream-mbedtls logd mtd netifd nftables odhcp6c odhcpd-ipv6only ppp ppp-mod-pppoe procd-ujail uboot-envtools uci uclient-fetch urandom-seed urngd wpad-basic-mbedtls

Installation notes

First install from stock firmware: flash the factoryimage through the vendor firmware's upgrade page or recovery mode.
Already running OpenWrt or ImmortalWrt: flash the sysupgrade image from LuCI (System → Backup / Flash Firmware) or with the sysupgrade command.
The kernel / initramfs image boots from RAM without writing to flash — useful for a first install or for recovering from a failed flash.

Verify your download against the published checksum before flashing:

$ sha256sum openwrt-25.12.5-ramips-mt7621-asus_4g-ax56-squashfs-factory.bin
b18105e0194ad6419e551a5fd8261805b6c3d719f49b3b6026c4249cbe1e4005  openwrt-25.12.5-ramips-mt7621-asus_4g-ax56-squashfs-factory.bin

Build custom firmware

Need more than the default image for the ASUS 4G-AX56? Pick your packages — LuCI apps, themes, VPN clients — set the basics, and get a ready-to-flash OpenWrt image assembled from official packages in minutes.

Customize firmware for this device

More ASUS devices

More devices on ramips/mt7621

Upstream

Upstream & source

Images are assembled from packages compiled and published by the upstream OpenWrt and ImmortalWrt projects. The complete corresponding source code is available from those projects under the GPL.