Download AirOS 5.6.15 signed and unsigned :
Go back to the 5.6.15 signed version on your nanostation and reset factory.
Extract the ubntbox file from the unsigned firmware with the binwalk utility and download it to the nanostation in the /tmp/fwupdate.real file :
$ binwalk -e XW.v126.96.36.199572.170328.1052.bin $ scp _XW.v188.8.131.52572.170328.1052.bin.extracted/squashfs-root/bin/ubntbox email@example.com:/tmp/fwupdate.real (password "ubnt")
Download on nanostation the unsigned firmware in the file /tmp/fwupdate.bin :
$ scp XW.v184.108.40.206572.170328.1052.bin firstname.lastname@example.org:/tmp/fwupdate.bin (password "ubnt")
initate firmware update :
$ ssh ubnt @192.168.1.20 (password "ubnt") XW.v5.6.15-sign.31612.170908.1440# cd /tmp XW.v5.6.15-sign.31612.170908.1440# ./fwupdate.real -m fwupdate.bin
Wait for the restart of the nanostation. The unsigned firmware is installed.
Follow the instructions on this page for install openwrt :
It also works with a nanostation loco m2 xm signed but with version 6.0.3 :
It will probably work with similar devices.