OpenWRT

From WugWiki

Getting started

Get OpenWRT here : http://downloads.openwrt.org/whiterussian/

Use squashfs if this is your first attempt at loading something new on the WRT54.

Remember the basics, before doing anything, do the following

nvram set boot_wait=on   

This enables boot_wait, the ability to tftp firmware across if things go bad

If you bugger up your firewall severely and can't get in, or perhaps do something even dumber... who knows, have no fear, openwrt built in a failsafe boot, that boots with your existing nvram settings, but does not load firewall, and some other extras, allowing you to go in, and modify the nvram to a stable state! to boot failsafe,

# unplug the power
# plug back in
# as soon as the dmz light pops on, 
# hit the reset button for 1 second (or until dmz light starts flashing)
# go in and fix your mess!

Client Mode ( break the bridge ) with firewalled wireless interface

WRT54CLIENT-REVFWWL Put the WRT into client mode, break the bridge and firewall wireless.

AP Mode wifi and lan separated ( break the bridge mode ) ie firewalled wireless interface Follow Howto for client mode, but where it says

nvram set wl0_mode=sta 
replace it with
nvram set wl0_mode=ap 

and set your ap name and channel with

nvram set wl0_ssid=my_AP_NAME
nvram set wl0_channel=my_AP_chan

do firewalling as in clientmode

AP Mode and reversing the firewall to WAN

WRT54AP-REVFWWAN WRT is AP with wifi and lan on the bridge. WAN interface connected to your private network firewalled from LAN and Wireless. (Don't break the bridge)

TFTP Uploading

The basic procedure for uploading/recovering is outlined below.

You will need:

Linux machine with tftp
Image that you want to upload
A network cable directly to the WRT
Your PC set to an IP in the 192.168.1.0/24 network (eg: 192.168.1.2) Not .1!

Heres how

• First, unplug the power from your WRT.

• Then, execute these commands on your linux machine

tftp 192.168.1.1
> binary
> trace
> rexmt 1
> put openwrt-g-code.bin

On Windows XP and Server 2003 ( comes standard )

Start -> Run ... -> type cmd

In the command prompt window type : tftp -i 192.168.1.1 put fwimage.bin

Dont press enter on the "put" just yet!

Now plug in the Power

about 2 seconds later (if you aren't sure when its ok to hit enter on put command, have another terminal running with a ping on 192.168.1.1, as soon as a response comes, hit enter on put!)

hit enter on the tftp "put" command.

It should take a few seconds, and then you'll see it start the actual upload, things will scroll quite fast

Now wait a few minutes for it to complete the boot, and try pinging it.