Keenetic Ultra KN-1810
Unpack the  to your USB-flash drive with EXT4 filesystem.
Default credentials (root:keenetic) ssh port 222.
Then disconnect the hard drive from your computer and connect it to the router. In the web interface, go to the 'OPKG' page and make the following settings:
- Drive: OPKG (EXT4 partition label)
- Initrc script: /opt/etc/init.d/rc.unslung
After that you need to enable opkg chroot in CLI