Zyxel GS1900-10HP A1 OpenWrt Firmware

CPU: Realtek RTL8380M
RAM: 128 MB
Flash: 16 MB

The Zyxel GS1900-10HP A1 is supported by OpenWrt on the realtek/rtl838x target. 2 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	Realtek RTL8380M
CPU cores	1
CPU frequency	500 MHz
RAM	128 MB
Flash	16 MB
1 Gbit Ethernet ports	8
Switch	Realtek RTL8380M

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	realtek/rtl838x	zyxel_gs1900-10hp-a1

Downloads

Download images

OpenWrt 25.12.5 · realtek/rtl838x

Image	Type	sha256
openwrt-25.12.5-realtek-rtl838x-zyxel_gs1900-10hp-a1-initramfs-kernel.bin Minimal kernel image, useful for first install or recovery.	kernel	d0fa60876cb8…
openwrt-25.12.5-realtek-rtl838x-zyxel_gs1900-10hp-a1-squashfs-sysupgrade.bin Not sure? Pick this if upgrading from OpenWrt.	sysupgrade	183c55989b12…

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

Packages & install

Default packages & installation

Default packages

Every image for the Zyxel GS1900-10HP A1 ships these packages by default. The customize option below lets you add or remove packages before the image is assembled.

Device packages (1)

realtek-poe

Target default packages (21)

apk-mbedtls base-files ca-bundle dropbear ethtool firewall4 fstools kmod-gpio-button-hotplug libc libgcc libustream-mbedtls logd mtd netifd odhcp6c procd-ujail uboot-envtools uci uclient-fetch urandom-seed urngd

Installation notes

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-realtek-rtl838x-zyxel_gs1900-10hp-a1-initramfs-kernel.bin
d0fa60876cb822c6cb4d4d3daed4e3c846f625cff2ef5c13e28617e5280dbcb0  openwrt-25.12.5-realtek-rtl838x-zyxel_gs1900-10hp-a1-initramfs-kernel.bin

Build custom firmware

Need more than the default image for the Zyxel GS1900-10HP A1? 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 Zyxel devices

More devices on realtek/rtl838x

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.