[RndTbl] Summer project

Colin Stanners cstanners at gmail.com
Fri Mar 29 11:01:58 CDT 2013

-Routers have options to be forced to run only G, only N, or auto select
G/N based on the client. Most wireless chipsets will automatically select
the best protocol based on signal level and RF environment. There is the
option to flash a highly-featured OS like DD/OpenWRT for more control,
although most Dlinks use a chipset that's less supported.

-Usually N protocol should have more range than G, if not it's likely a
router bug, in that case setting your router to run everything G-only will
only cost you performance.

-Wireless range extension is a bad idea - the only somewhat-good way is to
have an extender with 2 radios on different frequencies. If you try to to
do it with a device with one radio, throughput is cut in at least half
because the radio is receiving and transmitting the same data, often it's
cut more because that radio's transmissions are causing retransmittions at
your main AP and vice-versa.

-Best option to extend wireless range is a second AP on a different channel
wired to the first, or increase the antenna size or directionality at your
main AP.

-Are you sure you found cards with a chipset that's not supported under
Win7? There's only like a dozen different series of chipsets, you may need
to find a driver from a supported card from a different brand with the same

-Atheros is generally the best wifi chipset. Cards can be gotten online or
at MX very cheaply.

-If you're doing testing, won't the machines be next to each other? If so
gigabit equipment is the same price as wifi and gives you 6-15x the speed
of N wifi equipment for the same price; even much more when you consider
total intranetwork speed.

On Fri, Mar 29, 2013 at 6:48 AM, Mike Pfaiffer <high.res.mike at gmail.com>wrote:

>         Sorry if this is a little disjointed. I'm half asleep (which is
> usually when I get ideas - always a dangerous thing especially when I'm
> half asleep). ;-)
>         Every summer the CLL at the Aboriginal Centre shuts down for the
> month of August. Normally I ask the owners of the parent company (a
> recycler) if I can borrow some equipment for both July and August so I can
> learn more about specific computer related things. Normally they are topics
> discussed here or at the MUUG meetings. I know it is only almost April but
> why wait until the last second... The owners (Alvin and Karen) usually like
> me to have some clear goals in mind when I propose a project. As a result I
> thought I'd bounce a few ideas off the pros and semi-pros here...
>         Thanks to Rob D. I think I finally have my head wrapped around the
> concept of port forwarding. A couple of months ago he asked me to set up a
> Minecraft server for development purposes and so far things seem to work.
>         My current physical assets are a D-Link 655 wireless router, and a
> (Debian) LAMP server running on a G4 server (which I should update soon), a
> USB "N" dongle which may or may not work, a Mac Mini which can connect to
> the router via the "G" protocol, and an external antenna for the router. Oh
> and I have those two Check Point wired routers.
>         Chris H. says when the router is running the "N" protocol in the
> house the range is the edge of the property in the front and can not be
> picked up from the back. Inside the house was no problem. The router was
> located on the ground floor near the front of the house. The guys from the
> seniors radio club think it might be because of the stucco on the house. I
> could re-position the antenna to be in front of the front window.
>         Anyhow the ideas I had were to try a bit more on the port
> forwarding thing by having second machine connected to the router and use
> the router as the main method of connecting to the services I am running.
> As before this would not be connected to the internet. The method I used
> last time was to connect to the IP of the LAMP server (eg. 192.168.X.Y
> instead of the router at 192.168.X.1 port 80).
>         Then I'd try to extend the range to the back yard by using a
> second router at the back of the house. The second router would get the
> wireless signal from the first and repeat it.
>         I'd like to know if there are any routers, custom built or out of
> the box, which will say transmit with the "G" AND "N" protocols as opposed
> to the "G" OR "N" protocols. The D-Link router will allow the first
> connection to determine subsequent connections. For example of the first
> connection is a "G" connection those wishing to connect with the "N"
> protocol only will not be able to do so. My temporary solution is to limit
> the router to "N" only. This means my Mac Mini can't connect since it
> doesn't support "N". With some fancy wiring I suppose I could use a couple
> of wireless routers together and have each do a different protocol.
>         Since the Lab is switching the classroom to Windows 7 and half the
> machines are running cards which don't have new drivers (and don't work) I
> may be able to snag some "G" cards for testing under Linux. Are there any
> G/N cards people here would recommend to the parent company? I'm thinking
> if they are going to order a bunch they may as well order some spares (and
> I can use one for testing).
>         So far I'm looking to request a PC (to run Ubuntu Server and
> Minecraft) and an "N" router. Maybe a couple of PCI NICs and another
> external antenna. Do folks here think my ideas are clear enough to bring to
> the owners?
>         I had half a dozen more ideas when I started but forgot most of
> them when I turned on the computer. ;-) Is there anything more which would
> be worth checking out given I am a slow learner with a high level of
> frustration at the moment?
>                                 Later
>                                 Mike
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