critical WPA2 vulnerabilities afoot, see KRACK attacks (discussion @ /r/KRaCK, HN, /r/netsec, Slashdot)

Linksys WRT54G v1.1

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Linksys WRT54G v1.1

Manuf/OEM/ODM CyberTAN

FCC approval date: 23 July 2003

Serial Num. Prefix: CDF2 or CDF3

Local image
Linksys WRT54G-02.jpg

Type: wireless router

FCC ID: Q87-WRT54G11

Power: 12 VDC, 1 A
Connector type: barrel

CPU1: Broadcom BCM4702 (125 MHz)
FLA1: 4 MiB
4,194,304 B
32,768 Kib
4,096 KiB
32 Mib
0.00391 GiB
(Brand? Model?)
RAM1: 16 MiB
16,777,216 B
131,072 Kib
16,384 KiB
128 Mib
0.0156 GiB
(Brand? Model?)

Expansion IFs: none specified

WI1 chip1: Broadcom BCM4306
WI1 chip2: Broadcom BCM2050
WI1 802dot11 protocols: bg
WI1 antenna connector: RP-TNC

ETH chip1: Broadcom BCM4702
Switch: ADMtek ADM6996
LAN speed: 10/100
LAN ports: 4
WAN speed: 10/100
WAN ports: 1

bg

Stock FW OS: Linux

Third party firmware supported: DD-WRT • (List), OpenWrt, Tomato • (List), TomatoUSB • (List)

Default SSID: linksys (51 addl. devices)
Default IP address: 192.168.1.1
the IP 192.168.1.1 is used by 1025 additional devices
of which 138 are Linksys devices
Default login user: blank
Default login password: admin
blank:admin credentials used by 266 additional devices
of which 137 are Linksys devices

802dot11 OUI: none specified

 CPU1 brandWI1 chip1 brandWI1 chip2 brand
Linksys WRT54G v1.0BroadcomBroadcomBroadcom
Linksys WRT54G v1.1BroadcomBroadcomBroadcom
Linksys WRT54G v2.0BroadcomBroadcomBroadcom
Linksys WRT54G v2.2BroadcomBroadcomBroadcom
Linksys WRT54G v3.0BroadcomBroadcomBroadcom
Linksys WRT54G v3.1BroadcomBroadcomBroadcom
Linksys WRT54G v4.0BroadcomBroadcomBroadcom
Linksys WRT54G v5BroadcomBroadcomBroadcom
Linksys WRT54G v5.0BroadcomBroadcomBroadcom
Linksys WRT54G v6.0BroadcomBroadcomBroadcom
Linksys WRT54G v7.0AtherosAtheros
Linksys WRT54G v7.2BroadcomBroadcom
Linksys WRT54G v8.0BroadcomBroadcom
Linksys WRT54G v8.1BroadcomBroadcom
Linksys WRT54G v8.2BroadcomBroadcom
Linksys WRT54GHRalinkRalink
For a list of all currently documented Broadcom chipsets with specifications, see Broadcom.


Wireless-G Broadband Router

 • Support page • Downloads (US)

Links of Interest[edit]

Flashing[edit]

Flashing DD-WRT[edit]

 

Fixme.gif This section is out of date!

WARNING!!!
Do not use V24 RC6.X builds on the WRT v1.X units. There is high probability that you will brick your V1.x unit by installing it..
As of 07/20/2010 v24-sp2 is unconfirmed on this device
As of 07/20/2010 Instruction are written for the v1.0, v1.1 unconfirmed

[Comment --n8hfi: On a very old WRT54G v1.0, I found it necessary to upgrade with a newer Linksys firmware before I could load DD-WRT. The original firmware (Linksys v1.00.8 Dec 24 2002) gave a 'incorrect image file' error on on both the mini and standard DD-WRT v23 SP2 images. The sequence that worked was (all done with the web GUI and-ugh-IE):
  1. Restore factory defaults with the original firmware.
  2. Upgrade to Linksys firmware version 4.21.1. You can get it here. Read the fine print carefully, not all firmware versions work with all hardware versions.
  3. Then upgrade to dd-wrt.v24-15230_VINT_mini.bin. I got the Continue page, but never got the DD-WRT GUI.
  4. Hold the reset button for 30 seconds (I didn't cycle power or anything else on the router.)
  5. Then I got the DD_WRT GUI. I reset it to factory defaults with the GUI, although this step may have been unnecessary, since I'd just flashed it.
  6. Then I upgraded to dd-wrt.v24-15230_VINT_std.bin. I selected the 'restore factory defaults after flashing' option while doing this.
  7. all set [Comment from jas3 on 16-Mar-2008: The above worked for me. I then updated from standard to dd-wrt.v23_vpn_generic.bin which succeeded as well]
  8. May08, When upgrading to v24, please do a full firmware reset (hold reset button for 30 seconds on power up). I did not do this when upgrading to v24 and was getting all sorts of strange behaviors from my router. After resetting and then reconfiguring the router, all was well.
  9. Check for recommended builds here.

Flashing OpenWrt[edit]

Linksys WRT54G

Flashing Tomato[edit]

Upgrading[edit]

Reverting[edit]

JTAG-Serial Info[edit]

USB Info[edit]

vlan Info[edit]

Pictures[edit]

Images
FCCID Q87-WRT54G11

Notes[edit]

DD-WRT Notes[edit]

[dgb: 2009.04.25 V1.0 hardware with 1.02.1 firmware] On a V1.0 box with firmware 1.02.1 Feb 2003... First there is no administration tab, look under "system". With IE and eventually with Firefox pushing the Upgrade button resulted in a chooser (browser). I choose the dd-wrt bin file and pushed the Upgrade button, the browsers each failed. IE reported the server was busy or not available. Firefox sent a dump off to Microsoft. So I located and tried to install a newer Linksys firmware load - same results. I then loaded up Netscape, turned off the blockers, configured it to open pop-ups in a new tab, choose the newer Linksys firmware and pressed update. It showed a progress bar as the firmware was loaded into the vintage box, Eventually the page went blank on "<nowiki>http://192.168.1.1/upgrade.cgi</nowiki>". Lights occasionally flicker as I impatiently wait and document the differences I've seen to this point.

I now have Linksys FW revision v4.21.1 and an Administration tab...30/30/30

Still using NS and under Administration/Firmware Upgrade I selected the dd-wrt load dd-wrt.v24-9517_vint_voip, an upload progress bar displayed followed by "upgrade are failed!", I choose continue... Repeating the process has the same result. Third attempt, this time with IE - same result. I surmise that the router is not actually attempting to flash itself, but failing the .bin file. This for two reasons, the progress bar never gets much past 50% and the router never 'goes away", in fact it reports and error and wants to continue. The progress bar actually completes once then starts again before the failure notice.

Now I'm guessing here, but maybe some sick firmware developer who wasn't even in college when v1.0 hardware was available coded in an assert that the .bin file must be able to fit within the smaller modern architectures. I used IE to get the Linksys firmware to use dd-wrt.v24-9517_VINT_mini and "Upgrade is successful" from the unit. Pressed "continue" presented root/admin and here's my old friend dd-wrt! I can feel a new wireless bridge being born... 30/30/30 more Scotch, more beer.

Still using IE and using the dd-wrt upgraded to the desired ...voip load I wanted all a long. 30/30/30...

The old box is now running dd-wrt v24(05/20/08)voip uptime 1 min. There probably isn't a lot of this old stuff out there so maybe this isn't of interest to anyone else - but if you're trying, get Netscape for that first giant step... [end dgb]

Hardware Modification[edit]

See Also[edit]