Tech Support > Computers & Technology > Software & Applications > Flashing a WRT54G router (with v7.00.1 firmware) with a linux firmware?
Flashing a WRT54G router (with v7.00.1 firmware) with a linux firmware?
Posted by gaikokujinkyofusho@gmail.com on September 24th, 2007


I have a WRT54G router with v7.00.1 firmware (serial number starting
CDFE1...) and I would like to flash it with one of the Linux firmware
distros (for better QoS, user restriction management, etc) but I read
on the Tomato site (http://www.polarcloud.com/
tomatofaq#how_do_i_find_my_linksys_wrt54) that my router doesn't seem
to be supported and similar on the Bitsum (http://www.bitsum.com/
openwiking/owbase/ow.asp?WRT54G5%5FCFE) site.

My question is: Is there a relatively full featured Linux firmware
"upgrade" that will work on my model of WRT54G router? Any help or
suggestions would really be appreciated!

Cheers

-Gaiko

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Posted by ***** charles on September 24th, 2007


<gaikokujinkyofusho@gmail.com> wrote in message
news:1190637128.472928.313880@w3g2000hsg.googlegro ups.com...
Unfortunately you bought the wrong router. Linksys used to make
WRT's that could be flashed with a different OS. When they decided
to make cheaper models with smaller amounts of ram that was their
downfall. Now Linksys makes two different models of WRT one is
called the WRT54G which you have and is not (as I know) upgradeable
and a WRT54GL, the L being the Linux model. Since the L model
has more ram and it costs a few bucks more that is the one flashers
tend to buy. It is the only one I sell to customers since I know the
limitations of the regular model. I don't know if ever the regular model
will be "upgradeable" since hackers can do wonders sometimes. I
sold all my wireless routers several months ago since I am waiting for
the 802.11n stuff to be ratified, more power longer distance.

later,
charles.....



Posted by Ignoramus3778 on September 24th, 2007


Can someone give me a quick rundown why a router benefits from being
flashed by Linux?

I mean, a router should do wifi and routing, I cannot see what else it
could do?

I am sure that I am missing something, but I do not know what it is.

i

Posted by Grant Edwards on September 24th, 2007


On 2007-09-24, Ignoramus3778 <ignoramus3778@NOSPAM.3778.invalid> wrote:

I assume you mean flashed with one of the open-firmware
versions of Linux?

http://openwrt.org/

1) You get to pick what features you want and don't want.

2) The open-firmware projects have a lot of advanced features
that stock firmware doesn't (QoS, VPN support, bridging
modes, better DHCP/DNS integration, etc.)

--
Grant Edwards grante Yow! I'm having a MID-WEEK
at CRISIS!
visi.com

Posted by Ignoramus3778 on September 24th, 2007


On Mon, 24 Sep 2007 14:57:02 -0000, Grant Edwards <grante@visi.com> wrote:
Very nice. I just surplused my old WRT54G router (right now on
eBay). This was done due to upgrade of my home Linux network to
Gigabit Ethernet.

I will keep an eye when there is news on my D-Link DIR-655 802.11n
gigabit router.

I use a basement linux server to provide firewall services to my home
network (to private computers witj 10.0.0.* addresses). I have a
feeling that it is a lot easier to do all that stuff (like VPN) using
a regular Linux box, though I may be mistaken.

The one feature that I would definitely like is enable better NATting,
specifically by exporting ssh port and connecting it to my laptop.

But I can live even without it, by using port redirection (redirecting
port back to the laptop) through the basement server.

Very interesting. I appreciate the info.


i

Posted by CptDondo on September 25th, 2007


Ignoramus3778 wrote:
One of mine does:

take pictures at intervals as I travel via gphoto2
act as a GPS server for my handheld
download digital cameras
automagically link up with my home routers and dump pics and route into
to home server
Oh, and yeah, act as a route.

Another one does:

act as a firewall, nat, and such (pretty normal there, except that it
also acts as a bridge to the above router, and automagically connects
once the van is in range)

Yet another one:

runs a secure connection to a public demo
isolates my test lan from the corporate lan
acts as DHCP server

In other words, it's a regular linux box with all the capabilities,
limited only by size of flash (4 - 8 MB) and RAM (8 - 32 MB).

--Yan

Posted by Ignoramus30458 on September 25th, 2007


On Tue, 25 Sep 2007 08:43:11 -0700, CptDondo <yan@NsOeSiPnAeMr.com> wrote:
How does it act as a GPS server? Does it have a built in GPS receiver?

My own feeling about all this is that a regular Linux box can do those
routing things with more convenience.

I have a network at home with NATs, private subnets, etc, all
controlled by a regular Linux computer acting as a firewall.

i

Posted by § on September 25th, 2007


CptDondo wrote:
Also VPN, wifi signal strength and segmentation to name other uses.

Posted by § on September 25th, 2007


Ignoramus30458 wrote:
I'm interested in the function as well.

The convenience factor for me was *not* tying up another pc and spending
the time for a linux install/config.

The DD-WRT flash and config took all of about 15 minutes total.

Still a very good way of doing it.

Posted by CptDondo on September 25th, 2007


Ignoramus30458 wrote:
It's got a $30 USB GPS puck.

It *is* a regular linux box. There is no way a "regular" computer would
work in a van; the energy use alone would kill the batteries.

A MIPS-based router only uses about 120 ma @ 12vdc IIRC, has no fans and
no moving parts. With the OS on flash, you don't have to worry about
power conditioning. You can set it up and forget it. One of mine is in
an attic, in heat and cold.

Your regular computer probably uses about 75 watts, has fans and a hard
drive that can fail, and needs to be in a conditioned environment with a
UPS. And your regular computer still needs a switch to operate, or must
have additional hardware to act as a switch on its own.

These little units have a built-in 6 port switch with vlan capability.

--Yan

Posted by Ignoramus30458 on September 25th, 2007


On Tue, 25 Sep 2007 11:06:38 -0500, § <tdstr@foadspammer.com> wrote:
Just 15 minutes? That's great. I am very impressed. I am not trying to
demean what you do, at all, I think that it is great.

As for tying another PC, a Linux box can do all kinds of things
besides being a firewall. I do not have a "dedicated firewall linux
box" myself.

My approach is, obviously, much more applicable to a wired situation
than to a wifi situation, where your solution excels.

(I have a wifi subnet at home, and use ssh port redirection to
accomplish some of the things that you are doing)

Yes. I absolutely love linux in that it gives me the full power to do
whatever I want, without me being restricted to "no more than 64
sockets without a Professional license", etc.

i

Posted by Ignoramus30458 on September 25th, 2007


On Tue, 25 Sep 2007 09:10:18 -0700, CptDondo <yan@NsOeSiPnAeMr.com> wrote:
I am very interested in buying one for my laptop. Would you recommend
a particular one that works with Linux?

Great point!

Yes. You convinced me that this approach has very tangible benefits,
esp. for mobile situation.

i

Posted by § on September 25th, 2007


Ignoramus30458 wrote:
That's a busy box!

I hear yah on that one. I'm real curious on how CptDondo did his usb
gps thing on his wrt54. Google searching as I type....

Posted by Ignoramus30458 on September 25th, 2007


On Tue, 25 Sep 2007 11:29:35 -0500, § <tdstr@foadspammer.com> wrote:
It is not a big deal traffic-wise and CPU-wise.

I have another linux box that is my plasma TV box (we watch movies
with it), that is also a nameserver for my domains, backup webserver
for algebra.com, and it does quite a bit more of other things as well.


Posted by Mark T.B. Carroll on September 25th, 2007


Ignoramus30458 <ignoramus30458@NOSPAM.30458.invalid> writes:


Holux do a SiRF III one IIRC. I think I needed the PL2303 driver for
that, and for another one I bought. So long as it talks NMEA 0183 you're
probably fine - gpsd and other applications tend to understand that.

Mark (not sure how he should trim the Newsgroups: line)

Posted by Keith Keller on September 25th, 2007


On 2007-09-25, Ignoramus30458 <ignoramus30458@NOSPAM.30458.invalid> wrote:
It depends on what you mean by convenience. The Captain has already
laid out some points (moving parts, power consumption); I'd like to add
(slightly) increased security: by running an open-source OS on dedicated
firewall hardware, you isolate the machines behind the firewall device.
So if your firewall is cracked, there's still an extra step of having to
crack your home box. But if you're running additional services on your
firewall, they're compromised immediately if the firewall is.

--keith

--
kkeller-usenet@wombat.san-francisco.ca.us
(try just my userid to email me)
AOLSFAQ=http://www.therockgarden.ca/aolsfaq.txt
see X- headers for PGP signature information


Posted by Ignoramus30458 on September 25th, 2007


On Tue, 25 Sep 2007 13:23:02 -0400, Mark T.B. Carroll <Mark.Carroll@Aetion.com> wrote:
OK, I think that I will buy this:

http://www.newegg.com/Product/Produc...82E16858179009


i

Posted by CptDondo on September 25th, 2007


§ wrote:

Look around on the OpenWrt site. The Broadcom BCM47xx SOC has USB so
you can hardware hack a linksys for USB. Me, I took the easy way; I
bought a Linksys WRTSL54GS, which comes with a USB port. The other two
routers I have are Viewsonic WR100; see my writeup on the openwrt page:

<http://wiki.openwrt.org/OpenWrtDocs/Hardware/Viewsonic/WR100>

--Yan

Posted by CptDondo on September 25th, 2007


Mark T.B. Carroll wrote:
I think that's what I have. Definitely any of the Sirf III chipset
pucks is the way to go. PL2303 sounds familiar too; I seem to recall
that I needed that module as well...

You can buy them on E-Bay for $30 or so, and that chipset is truly amazing.

--Yan