starting from this version webflashing will be possible for future upgrades. for web flashing use the fonera-firmware.bin to upgrade a already 
installed dd-wrt from web. consider that this file will not work with versions earlier than 2006-0107.




1.
mount a serial adapter to the fonera device
(the serial adapter documentation can be found at http://wiki.openwrt.org/OpenWrtDocs/Hardware/Fon/Fonera)

2.
set your terminal client to 9600-8-N-1 

3.
enter the RedBoot console by pressing CTRL+C

4.
copy root.fs and vmlinux.bin.l7 to your tftp server directory

5.
configure the RedBoot bootloader IP and TFTP server settings using
ip_address -l [local ip address] -h [remote server address]

6.
flash the unit by entering the following commands

RedBoot> fis init
About to initialize [format] FLASH image system - continue (y/n)? y
*** Initialize FLASH Image System
... Erase from 0xa83e0000-0xa83f0000: .
... Program from 0x80ff0000-0x81000000 at 0xa83e0000: .

load -r -v -b 0x80041000 root.fs
Using default protocol (TFTP)
Raw file loaded 0x80041000-0x802e3fff, assumed entry at 0x80041000
RedBoot> fis create -b 0x80041000 -f 0xA8030000 -l 0x002C0000 -e 0x00000000 rootfs
... Erase from 0xa8030000-0xa82f0000: ............................................
... Program from 0x80041000-0x80301000 at 0xa8030000: ............................................
... Erase from 0xa83e0000-0xa83f0000: .
... Program from 0x80ff0000-0x81000000 at 0xa83e0000: .

RedBoot> load -r -v -b 0x80041000 vmlinux.bin.l7
Using default protocol (TFTP)
Raw file loaded 0x80041000-0x80120fff, assumed entry at 0x80041000

RedBoot> fis create -r 0x80041000 -e 0x80041000 -l 0x000E0000 vmlinux.bin.l7
... Erase from 0xa82f0000-0xa83d0000: ..............
... Program from 0x80041000-0x80121000 at 0xa82f0000: ..............
... Erase from 0xa83e0000-0xa83f0000: .
... Program from 0x80ff0000-0x81000000 at 0xa83e0000: .

RedBoot> fis create -f 0xA83D0000 -l 0x00010000 -n nvram
... Erase from 0xa83e0000-0xa83f0000: .
... Program from 0x80ff0000-0x81000000 at 0xa83e0000: .

reset

if everything went well it should look like this:



notes:

this short and dirty fonera port was done in less than 8 hours and is far from complete.
since i dont like slow serial terminals the kernel will startup with a baudrate of 115200. so don't be afraid if you see no message after the bootloader.
just change your terminal settings to 115200-8-N-1

from default the unit is configured to obtain its ip from a dhcp server. remote management is enabled per default on port 8080. so you can connect the unit 
on port 8080 as far you found out the ip.

if you switch the unit to client mode, this behaviour will change. the ethernet port will turn to a lan port with dhcp server enabled. so please take care of it
if you get into troubles