Fortinet FAP-221-B OpenWrt Firmware

CPU: Atheros AR9344
RAM: 64 MB
Flash: 16 MB

The Fortinet FAP-221-B is supported by OpenWrt on the ath79/generic 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	Atheros AR9344
CPU cores	1
CPU frequency	560 MHz
RAM	64 MB
Flash	16 MB
1 Gbit Ethernet ports	1
WLAN hardware	Atheros AR9344, Atheros AR9382

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	ath79/generic	fortinet_fap-221-b

Downloads

Download images

OpenWrt 25.12.5 · ath79/generic

Image	Type	sha256
openwrt-25.12.5-ath79-generic-fortinet_fap-221-b-squashfs-sysupgrade.bin Not sure? Pick this if upgrading from OpenWrt.	sysupgrade	d279497a45f7…
openwrt-25.12.5-ath79-generic-fortinet_fap-221-b-squashfs-factory.bin For first-time flash from stock firmware.	factory	0121461a45c5…
openwrt-25.12.5-ath79-generic-fortinet_fap-221-b-initramfs-kernel.bin Minimal kernel image, useful for first install or recovery.	kernel	b31e35346879…

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

Packages & install

Default packages & installation

Default packages

Every image for the Fortinet FAP-221-B ships these packages by default. The customize option below lets you add or remove packages before the image is assembled.

Target default packages (29)

apk-mbedtls base-files ca-bundle dnsmasq dropbear firewall4 fstools kmod-ath9k kmod-gpio-button-hotplug kmod-nft-offload libc libgcc libustream-mbedtls logd mtd netifd nftables odhcp6c odhcpd-ipv6only ppp ppp-mod-pppoe procd-ujail swconfig 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-ath79-generic-fortinet_fap-221-b-squashfs-sysupgrade.bin
d279497a45f7d3f43bc611ce346dc7dc942fd0c08c2ecc74dc6e003572839223  openwrt-25.12.5-ath79-generic-fortinet_fap-221-b-squashfs-sysupgrade.bin

Build custom firmware

Need more than the default image for the Fortinet FAP-221-B? 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 Fortinet devices

More devices on ath79/generic

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.