Linksys WRT300N v1

WRT300N v1.0 serial numbers appear to start with CNP0.

Probable 00:18:39 OUI for both interfaces, but this could potentially be incorrect (00:18:39 is an OUI on some labels anyway)

 Proc:        Broadcom BCM4704KPBG CT0542 P11 757088.M5 Flash:        Intel JS28FR320 C3BD70 A5437913 RAM:         hynix 602U HY5DU281622ETP-J Switch:      Broadcom BCM5325FKQMG RD0603 P11 765671A.5 Radio1 Chip1: Broadcom BCM4321LKBG HS0607 p10 EN6561.4 N1

Flashing DD-WRT

 * 1) Download DD-WRT v24 Mini from this link: ftp://dd-wrt.com/others/eko/BrainSlayer-V24-preSP2/older/09-08-09-r12874/broadcom/dd-wrt.v24_mini_wrt300n.bin
 * 2)  Read the peacock announcement found here: http://www.dd-wrt.com/phpBB2/viewtopic.php?t=51486
 * 3) Do a proper HARD reset on your router.
 * 4) Set your computer to a static IP address of 192.168.1.7 Subnet mask to 255.255.255.0
 * 5) Plug a lan cable from your computer to a LAN port on the router. Disable any wireless on your computer
 * 6)  Open your web browser to 192.168.1.1
 * 7) Find any settings you might want to keep and copy them down or cut and paste them(e.g. MAC addresses for MAC filtering)
 * 8) Go to Administration, Firmware upgrade, in the linksys webgui.
 * 9) Browse to the dd-wrt.v24_mini_wrt300n.bin you downloaded, and hit upgrade.
 * 10) Wait until you can access the dd-wrt webgui at 192.168.1.1
 * 11) Power cycle the router
 * 12) Wait until you can access the dd-wrt webgui at 192.168.1.1
 * 13) Do ANOTHER hard reset on the router.
 * 14) Go in and set your user name and password by carefully typing each of them in.
 * 15) Set your computer to auto IP and auto DNS.

Flashing Tomato
Confirmed working with TomatoUSB NoUSB-Std build 54 (30 Nov 2010) Kernel 2.6 MIPSR1.

Must be flashed from within previously-installed DD-WRT build.

Pictures
Cisco's Images

DD-WRT Debricking information
Here is a thread which contains a JTAG method for debricking your WRT300N v1 and v1.1 model.

For further information about JTAG please see the wiki entry entitled TJTAG.

Post-DD-WRT Installation
Once you have completed all of the steps above, your router is already set and ready to be used, configured, etc.

DD-WRT Known Issues

 * Versions 1.0 and 2.0 of this router have 4MB flash, so JFFS will not work with the standard distros. Version 1.1 has 8MB of flash so may (untested) work with JFFS
 * I use static DHCP for my network and found that this page had strange errors (incorrect labels, missing radio buttons). To fix this, navigate to Administration -> Factory Defaults and then restore the factory defaults to the router.
 * Relatively same issue with MAC filtering where the word "error" replaced labels.
 * When editing settings on the Administration page for the first time (after flash or hard reset), make sure that you change the interface language dropdown to Simplified Chinese, then back to English. Otherwise the router will end up in Simplified Chinese until you either change it, or hard reset the router.
 * If you did not hard reset the router before you installed DD-WRT, then the login information is as follows:
 * Username: root
 * Password: Whatever your password was
 * Hard reset the router if you cannot figure out the login information. Refer here for the default login information.
 * Occasionally after changing a setting, the router will lose its connection to the internet. All you need to do to restore the connection is navigate to the Administration page and scroll to the bottom and hit the Reboot Router button.
 * I recommend that you change all the settings you want to change then reboot the router regardless.

Security LED in DD-WRT

 * (solved) Security LED Script WRT300n v1.1


 * The security LED will not light up after flashing on version 1.1. To fix this, go to Administration > Commands, type in the following and then click Save Startup:

As posted by osmosis

On the wiki for 150N is posted  root@DD-WRT:~# gpio enable 5 #(SECURITY LED - off - green) root@DD-WRT:~# gpio disable 5 #(SECURITY LED - on - green) root@DD-WRT:~# gpio disable 3 #(SECURITY LED - on - amber) root@DD-WRT:~# gpio enable 3 #(SECURITY LED - off - amber)

this applies for the WRT300Nv1.0 as well so to incorporate the amber into the mix as not secure: Also confirmed working on the WRT300N v1.1 WifiShadow 02:40, October 1, 2010 (UTC)