AirTight Networks C-75 OpenWrt Firmware
The AirTight Networks C-75 is supported by OpenWrt/ImmortalWrt on the ath79/generic target. 4 firmware images are available from the official OpenWrt 25.12.5 and ImmortalWrt 25.12.1 stable releases — download one below, or build a custom OpenWrt image for this device with your own package selection.
Build matrix
Supported firmware versions
| Distribution | Version | Target | Profile |
|---|---|---|---|
| OpenWrt | 25.12.5 | ath79/generic | airtight_c-75 |
| ImmortalWrt | 25.12.1 | ath79/generic | airtight_c-75 |
Downloads
Download images
OpenWrt 25.12.5 · ath79/generic
| Image | Type | sha256 |
|---|---|---|
| openwrt-25.12.5-ath79-generic-airtight_c-75-initramfs-kernel.bin Minimal kernel image, useful for first install or recovery. | kernel | 2da5a540ce02… |
| openwrt-25.12.5-ath79-generic-airtight_c-75-squashfs-sysupgrade.bin Not sure? Pick this if upgrading from OpenWrt. | sysupgrade | b7408511fb16… |
ImmortalWrt 25.12.1 · ath79/generic
| Image | Type | sha256 |
|---|---|---|
| immortalwrt-25.12.1-ath79-generic-airtight_c-75-squashfs-sysupgrade.bin Not sure? Pick this if upgrading from OpenWrt. | sysupgrade | b18168557dbe… |
| immortalwrt-25.12.1-ath79-generic-airtight_c-75-initramfs-kernel.bin Minimal kernel image, useful for first install or recovery. | kernel | 4db94a00d380… |
Downloads are served by the official OpenWrt/ImmortalWrt mirrors — unchanged upstream stable builds.
Packages & install
Default packages & installation
Default packages
Every image for the AirTight Networks C-75 ships these packages by default. The customize option below lets you add or remove packages before the image is assembled.
OpenWrt 25.12.5 · ath79/generic
Device packages (3)
ath10k-firmware-qca988x-ct kmod-ath10k-ct kmod-usb2
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
ImmortalWrt 25.12.1 · ath79/generic
Device packages (3)
ath10k-firmware-qca988x-ct kmod-ath10k-ct kmod-usb2
Target default packages (33)
apk-openssl base-files block-mount ca-bundle default-settings-chn dnsmasq-full dropbear firewall4 fstools kmod-ath9k kmod-gpio-button-hotplug kmod-nf-nathelper kmod-nft-offload libc libgcc libustream-openssl logd luci mtd netifd nftables odhcp6c odhcpd-ipv6only ppp ppp-mod-pppoe procd-ujail swconfig uboot-envtools uci uclient-fetch urandom-seed urngd wpad-openssl
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-ath79-generic-airtight_c-75-initramfs-kernel.bin 2da5a540ce02d439297444a359e6e78ad493a35b66f939b726f1a772f6fc96f6 openwrt-25.12.5-ath79-generic-airtight_c-75-initramfs-kernel.bin
Build custom firmware
Need more than the default image for the AirTight Networks C-75? 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 deviceRelated
Related devices
More devices on ath79/generic
Upstream
Upstream & source
- downloads.openwrt.org — ath79/generic 25.12.5
- downloads.immortalwrt.org — ath79/generic 25.12.1
- OpenWrt Table of Hardware
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.