Re: [CentOS] Which external WiFi device for laptop running CentOS5.3?

2009-06-19 Thread Julian Thomas
On Fri, 19 Jun 2009 14:31:33 -0400 fred smith wrote:


 David McGuffey wrote:
  Have decided to give up on the embedded Broadcom 4312 wireless device in
  my son's Dell laptop.  I get WEP open authentication to work, but
  nothing else.  I was about to dump the bcm43xx kernel module and the
  bcm43xx-microcode5.fw firmware and work with the newer b43 module and
  associated firmware.  However, he claims that at school, he has always
  had intermittent problems with wireless under Vista and wants an
  external device (USB or PCMCIA).

Why not look at a small access point that plugs into the RJ45 and uses USB for 
power?  DLink DWL-G730AP or 
other equivalent.

-- 
 Julian Thomas:   j...@jt-mj.nethttp://jt-mj.net
 In the beautiful Genesee Valley of Western New York State!
 -- --
 Half the people you know are below average.


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Re: [CentOS] Which external WiFi device for laptop running CentOS5.3?

2009-06-19 Thread Robert Moskowitz
Julian Thomas wrote:
 On Fri, 19 Jun 2009 14:31:33 -0400 fred smith wrote:
   
 
 David McGuffey wrote:
   
 Have decided to give up on the embedded Broadcom 4312 wireless device in
 my son's Dell laptop.  I get WEP open authentication to work, but
 nothing else.  I was about to dump the bcm43xx kernel module and the
 bcm43xx-microcode5.fw firmware and work with the newer b43 module and
 associated firmware.  However, he claims that at school, he has always
 had intermittent problems with wireless under Vista and wants an
 external device (USB or PCMCIA).
 

 Why not look at a small access point that plugs into the RJ45 and uses USB 
 for power?  DLink DWL-G730AP or 
 other equivalent.

If it really is an AP, it won't do the job, as an AP cannot be a client 
to another AP. 802.11 DOES have the concept of a wireless backbone, 
called WDS (wireless distribution system), but it is not yet defined 
(Work In Progress: 802.11s, I am a contributor to the security 
features). So each vendor has its own WDS implementation (MIT's OnePC 
implements part of draft 1 of 802.11s).

Of course there are devices out there that are referred to as wireless 
bridges (Linksys WRT54g is one) that act as a client and bridges an 
ethernet as a single client to the AP. Note that a wireless bridge is 
NOT an AP. Of course there are probably devices out there that can be 
configured either way

Note, I work on the 802.11 standards and know them well, but I don't 
know of all the flavors of implementations out in the wild.


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Re: [CentOS] Which external WiFi device for laptop running CentOS5.3?

2009-06-19 Thread S.Tindall

On Fri, 2009-06-19 at 17:06 -0400, Robert Moskowitz wrote:
 Julian Thomas wrote:
 
  Why not look at a small access point that plugs into the RJ45 and uses USB 
  for power?  DLink DWL-G730AP or 
  other equivalent.
 
 If it really is an AP, it won't do the job, as an AP cannot be a client 
 to another AP. 802.11 DOES have the concept of a wireless backbone, 
 called WDS (wireless distribution system), but it is not yet defined 
 (Work In Progress: 802.11s, I am a contributor to the security 
 features). So each vendor has its own WDS implementation (MIT's OnePC 
 implements part of draft 1 of 802.11s).
 
 Of course there are devices out there that are referred to as wireless 
 bridges (Linksys WRT54g is one) that act as a client and bridges an 
 ethernet as a single client to the AP. Note that a wireless bridge is 
 NOT an AP. Of course there are probably devices out there that can be 
 configured either way
 
 Note, I work on the 802.11 standards and know them well, but I don't 
 know of all the flavors of implementations out in the wild.


At least when running the Tomato Firmware, the Linksys WRT54GL (L =
linux) and WRT54G versions 4 and earlier (also linux-based) run WDS as
hosts/clients very effectively. I run several GLs as access points
across my lan with 0-2 more as WDS clients as needed.

As a side note, Tomato Firmware allows you to adjust transmitter power
up to 6 times the normal level and that has let me go through some very
think brick walls to pick up remote network cameras.

I should point out that both the host (access point) and client need to
be WRT54G/L routers for the above scenarios to work. As RM said, WDS is
vendor dependent.


Steve


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Re: [CentOS] Which external WiFi device for laptop running CentOS5.3?

2009-06-19 Thread Dag Wieers
On Fri, 19 Jun 2009, S.Tindall wrote:

 As a side note, Tomato Firmware allows you to adjust transmitter power
 up to 6 times the normal level and that has let me go through some very
 think brick walls to pick up remote network cameras.

We have to see what the result of that is on any offspring :-D

-- 
--   dag wieers,  d...@centos.org,  http://dag.wieers.com/   --
[Any errors in spelling, tact or fact are transmission errors]
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