OpenWrt

Tested with a modified Ralink AP-RT3052-V22RW-2X2 openwrt firmware image.

Usb, wifi, lan, all seem to work.

NOTE: This method was tested on firmware 2.21b available at Edimax Poland:

1. Enable telnet server
   • Log in to www interface, lets assume it is at address http://router
   • In address bar go to hidden sub-page: http://router/syscmd.asp
   • In input box enter:

     /usr/sbin/telnetd -l /bin/ash

   • Test if telnet server is working: telnet to the router
   • Note: this hack may not work on all firmware versions, I have tested it successfully on 2.21b.
2. Download flash files to router and start flashing process

cd /tmp
wget ~3g-6200n/openwrt-ramips-rt305x-v22rw-2x2-squashfs-sysupgrade.bin
wget ~3g-6200n/mtd
chmod a+x mtd
./mtd -r write openwrt-ramips-rt305x-v22rw-2x2-squashfs-sysupgrade.bin Kernel:RootFS

1. openwrt-ramips-rt305x-v22rw-2x2-squashfs-sysupgrade.bin file was published by lgolebio user on openrouter.info forum.
2. In case of problems it should be possible to flash back to original firmware via tftp firmware restore method.