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WiFi and Internet sharing

 
 
Jman
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      12-03-2003, 09:41 AM
I recently set up an AdHoc network among three computers, two desktop
and one notebook, and everything has been working fine. A week or so
ago, I enabled ICS on the notebook, which is now connected to a cable
modem and although the connection sharing is working, it does very
poorly. The notebook seems to retain most of the bandwith and the
other two computers get very little and can hardly surf or download
anything. If I attach the cable modem to any of the other two
computers, the same happens again, the computer connected to the modem
gets the bandwith. All three computers are running Windows XP Pro.

Browsing the web, I found something about a problem with ICS and the
MTU for the cable connection being smaller than the one used by the
wireless network, but after changing everything to make it work, the
same is still happening, so I guess it has nothing to do with MTU
settings.

I guess using a wireless router should be the best solution, but they
are very expensive and I can't afford one right now. Is there a
software router or any tweak that can help? I've tried the Windows XP
built-in connection sharing, SyGate, and NAT32e so far, but none of
them solved the problem. I also guess I should get another computer
and use it as a dedicated connection sharing system, but the problem
is the same, I can't afford buying another computer.

Thanks in advance.
 
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gary
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      12-03-2003, 06:00 PM
It might be a tuning issue, or it might simply be that you don't have enough
compute power or memory on any host to use it as a router for two other
active hosts. How much traffic do the non-ICS hosts generate? Put ICS on the
one with the fastest cpu and most memory - and don't run any application on
that host that will chew up lots of memory and cpu, because that will kill
your network.

For tuning, I suggest you visit

http://www.speedguide.net

and run the tcp analyzer tool. This will tell you some relevant CPU
settings. You can run it for each host. They also provide a tool to help you
reconfigure.

You might also consider network bridging, which should consume fewer
resources. However, I'm not entirely sure it works right with all wifi
adapters. I believe it requires being able to run the wifi adapter in
promiscuous mode, which I know does not work with all flavors of adapter on
XP. You'll need to check the Windows knowledge base and maybe the archives
of this group for a better answer on that.

I do agree that a router is your best solution. I keep hearing about
fantastic deals after rebate. Have you checked Best Buy, and the other usual
suspects for deals on the web? How about eBay? I'll bet you can find
something affordable. Before buying, I would check

http://www.dslreports.com/forums/18

for user experience with the hardware.


"Jman" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) om...
> I recently set up an AdHoc network among three computers, two desktop
> and one notebook, and everything has been working fine. A week or so
> ago, I enabled ICS on the notebook, which is now connected to a cable
> modem and although the connection sharing is working, it does very
> poorly. The notebook seems to retain most of the bandwith and the
> other two computers get very little and can hardly surf or download
> anything. If I attach the cable modem to any of the other two
> computers, the same happens again, the computer connected to the modem
> gets the bandwith. All three computers are running Windows XP Pro.
>
> Browsing the web, I found something about a problem with ICS and the
> MTU for the cable connection being smaller than the one used by the
> wireless network, but after changing everything to make it work, the
> same is still happening, so I guess it has nothing to do with
> settings.
>
> I guess using a wireless router should be the best solution, but they
> are very expensive and I can't afford one right now. Is there a
> software router or any tweak that can help? I've tried the Windows XP
> built-in connection sharing, SyGate, and NAT32e so far, but none of
> them solved the problem. I also guess I should get another computer
> and use it as a dedicated connection sharing system, but the problem
> is the same, I can't afford buying another computer.
>
> Thanks in advance.



 
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