Recent Linux/OpenWrt on the IXP4xx-based Actiontec MI424-WR which includes revisions A, C and D
(Last boot 2025-06-23 with the v6.16-rc1 kernel, using OpenWRT as rootfs)

Refer to OpenWrt Actiontec MI424WR page for the bulk of device information.

Notices where I had to deviate from the OpenWrt documentation:

• The UART uses 115200n8.
• When I held down RESET for 10+ seconds and the router rebooted, the web UI offered me to change the router admin password.
• As I had a UART connected and the jungo script was failing, and I had TFTP working anyway (it is required for the install...) I just downloaded the new RedBoot image with TFTP from the host, like this:
  Wireless Broadband Router> load -u tftp://192.168.1.2/rb-mi424wr-ROM.bin -r 0
• After installing RedBoot it was apparent that only the WAN port is working for downloading kernel and rootfs, so use the WAN port only with RedBoot.
• Created linux and root partitions like this:
  fis create -b 0x00080000 -l 0x00400000 -s 0x00400000 -f 0x50040000 -e 0x00080000 -r 0x00080000 -n linux
  

Files

• rb-mi424wr-ROM.bin - RedBoot flash image for the MI424-WR A/C/D

Getting OpenWRT up on it

Installing OpenWrt currently requires UART serial console access