Discussion:
Converting a WRT54GC (compact unit) into an Ethernet Bridge
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Eric Weaver
2009-05-13 03:50:39 UTC
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Anybody point me to how to turn a WRT54GC, the compact wireless router,
into a bridge like the WET11 or WET54? I've found how to do it for the
-G, -GS and -GL versions but not the GC...

Thanks.
Jeff Liebermann
2009-05-13 04:48:41 UTC
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Post by Eric Weaver
Anybody point me to how to turn a WRT54GC, the compact wireless router,
into a bridge like the WET11 or WET54? I've found how to do it for the
-G, -GS and -GL versions but not the GC...
It can't be done. The WRT54GC uses a Marvel chipset, which will not
work with DD-WRT or other alternative firmware. There seems to be
some cross platform hacks available that might work:
<http://en.wikipedia.org/wiki/Linksys_WRT54G_series#WRT54GC>
However, I don't think any of the devices listed has a client bridge
mode (not sure).
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Eric Weaver
2009-05-13 13:26:01 UTC
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Post by Jeff Liebermann
Post by Eric Weaver
Anybody point me to how to turn a WRT54GC, the compact wireless router,
into a bridge like the WET11 or WET54? I've found how to do it for the
-G, -GS and -GL versions but not the GC...
It can't be done. The WRT54GC uses a Marvel chipset, which will not
work with DD-WRT or other alternative firmware. There seems to be
<http://en.wikipedia.org/wiki/Linksys_WRT54G_series#WRT54GC>
However, I don't think any of the devices listed has a client bridge
mode (not sure).
OK, thanks. Doggone it. Gotta get a PCI card for the office machine
and move the WET11 over to the XBox...
w***@gmail.com
2013-07-13 00:58:59 UTC
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Post by Jeff Liebermann
Post by Eric Weaver
Anybody point me to how to turn a WRT54GC, the compact wireless router,
into a bridge like the WET11 or WET54? I've found how to do it for the
-G, -GS and -GL versions but not the GC...
It can't be done. The WRT54GC uses a Marvel chipset, which will not
work with DD-WRT or other alternative firmware. There seems to be
<http://en.wikipedia.org/wiki/Linksys_WRT54G_series#WRT54GC>
However, I don't think any of the devices listed has a client bridge
mode (not sure).
Well, I tried the IP806SM v231 firmware from http://www.everbesthk.com/8-download/sercomm_download.htm
changed the ID byte (0x000026) from 01 to 06 to match the WRT54GC v1.06.1 firmware from Linksys.
No luck, it gave me an error on the update page, and made no changes.

I suppose I could still try the Hawking or Airlink firmwares, but I'm not hopeful. At this point I'm just giving up and going to use one of my other computers as a bridge with a wireless dongle.
w***@gmail.com
2013-07-13 01:19:51 UTC
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Post by w***@gmail.com
Well, I tried the IP806SM v231 firmware from http://www.everbesthk.com/8-download/sercomm_download.htm
changed the ID byte (0x000026) from 01 to 06 to match the WRT54GC v1.06.1 firmware from Linksys.
No luck, it gave me an error on the update page, and made no changes.
I copied the header region from 0x00 to ox27 from the WRT54GC 1.06.1 firmware, and then it uploaded properly. I am now running the Sertec IP806SM v23.1A firmware on my WRT54GC!
p***@nwz.pt
2014-01-17 19:24:58 UTC
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Post by w***@gmail.com
Post by w***@gmail.com
Well, I tried the IP806SM v231 firmware from http://www.everbesthk.com/8-download/sercomm_download.htm
changed the ID byte (0x000026) from 01 to 06 to match the WRT54GC v1.06.1 firmware from Linksys.
No luck, it gave me an error on the update page, and made no changes.
I copied the header region from 0x00 to ox27 from the WRT54GC 1.06.1 firmware, and then it uploaded properly. I am now running the Sertec IP806SM v23.1A firmware on my WRT54GC!
Sorry for digging this out, but I have one WRT54GC laying around and want to play with it. Still running the Sertec Firmware with no problems? Can you tell me witch tool do you use to copy the firmware header region?
j***@gmail.com
2014-10-31 17:55:56 UTC
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Post by w***@gmail.com
Post by w***@gmail.com
Well, I tried the IP806SM v231 firmware from http://www.everbesthk.com/8-download/sercomm_download.htm
changed the ID byte (0x000026) from 01 to 06 to match the WRT54GC v1.06.1 firmware from Linksys.
No luck, it gave me an error on the update page, and made no changes.
I copied the header region from 0x00 to ox27 from the WRT54GC 1.06.1 firmware, and then it uploaded properly. I am now running the Sertec IP806SM v23.1A firmware on my WRT54GC!
with any luck that you're still on here, how do you edit these ID bytes etc to make it compatible? I'm way in over my head, but it's fun trying anyway, ha ha
b***@MIX.COM
2014-11-05 14:13:09 UTC
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Post by j***@gmail.com
how do you edit these ID bytes etc to make it compatible?
Use a hex editor, and just copy and paste the first 39 bytes
(decimal, base 10 number) from the stock firmware into the new
firmware. If you're using an Apple computer, 0xED is the best
editor. Someone else will have to suggest an editor for other
systems.

http://www.suavetech.com/0xed/0xed.html

Billy Y..
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sub #'9+1 ,r0 ; convert ascii byte
add #9.+1 ,r0 ; to an integer
bcc 20$ ; not a number
r***@gmail.com
2015-06-07 18:21:18 UTC
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Sorry to beat this dog to a pulp.. But. I can't find this sertec driver anywhere. Can you advise. Thanks!
j r pierce
2009-08-03 08:27:37 UTC
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Post by Eric Weaver
Anybody point me to how to turn a WRT54GC, the compact wireless router,
into a bridge like the WET11 or WET54? I've found how to do it for the
-G, -GS and -GL versions but not the GC...
does this wrt54gc have a ethernnet switch on it or at least one 'LAN'
port, in addition to the WAN internet port and the wireless ?

are you trying to use this wireless 'rouoter' as an access point?

if so... turn the DHCP server *OFF* in the WRT, configure its
WAN/Internet port for a oddball static IP subnet you'll never run
into, like 10.251.251.1 mask 255.255.255.0, configure its LAN IP for a
unused static IP in your LAN (so you can reach its configuration), and
plug your existing LAN into the LAN side. this will provide an
etthernet->wireless bridge, which is what a clasic WAP is.

now, if you're trying to do the opposite, and turn this 'router' into
a client of another wireless network, and brideg that existing
wireless network to an ethernet, forget it, this hack won't work.
j***@dgsd.us
2013-05-10 00:25:37 UTC
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Post by Eric Weaver
Anybody point me to how to turn a WRT54GC, the compact wireless router,
into a bridge like the WET11 or WET54? I've found how to do it for the
-G, -GS and -GL versions but not the GC...
Thanks.
Wow, how weird. We have a WRT54GC and I just typed in "WRT54GC bridge mode" and your question in google groups came up as the first search result. Anyways did you ever figure out how to set these in bridge mode?
Roy
2013-05-10 01:06:09 UTC
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Post by j***@dgsd.us
Post by Eric Weaver
Anybody point me to how to turn a WRT54GC, the compact wireless router,
into a bridge like the WET11 or WET54? I've found how to do it for the
-G, -GS and -GL versions but not the GC...
Thanks.
Wow, how weird. We have a WRT54GC and I just typed in "WRT54GC bridge mode" and your question in google groups came up as the first search result. Anyways did you ever figure out how to set these in bridge mode?
I don't know the specific answer to your question but if you want to
turn a router into an access point, here are some steps I have used

1. Turn off the DHCP server in the box.

2. Se the LAN address to an empty address on your LAN. Use this
address to manage the router

3. Plug your LAN into a LAN port on the router.

This works in most cases I have tried. The question is whether or not
the box will function with the WAN port rmpty. Some boxes won't work
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