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Re: [OM] A wireless router data point

Subject: Re: [OM] A wireless router data point
From: Charles Geilfuss <charles.geilfuss@xxxxxxxxx>
Date: Tue, 29 Mar 2011 13:57:32 -0400
  Interesting indeed. Makes me glad my house was CAT-5 hardwired in every
room when I bought it.

Charlie

On Tue, Mar 29, 2011 at 1:51 PM, Jim Nichols <jhnichols@xxxxxxxxxxxxx>wrote:

> Interesting!
>
> Jim Nichols
> Tullahoma, TN USA
> ----- Original Message -----
> From: "Ken Norton" <ken@xxxxxxxxxxx>
> To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
> Sent: Tuesday, March 29, 2011 12:18 PM
> Subject: Re: [OM] A wireless router data point
>
>
> >I recently found an interesting problem that could only be diagnosed
> > with WireShark.
> >
> > Living in a condo, there is too much channel contention and if I get a
> > room away from the WiFi router, I'm losing connection speed because of
> > the overlap with the neighbors. Well, that's usually not too much of
> > an issue, but here is where things got fuzzy.
> >
> > Let me set the stage here and kinda go generic so you can tell if you
> > have a similar issue:
> >
> > 1. My WiFi AP was set on Channel 6. Neighbor units an 1, 6 and 11. All
> > APs running security.
> >
> > 2. Everything is going fine, but I notice a lot of traffic on the AP
> > that isn't me. The activity lights are going berzerk.
> >
> > 3. Firing up WireShark, I see my packets and the other packets from
> > the household. But I'm also seeing packets from somebody else!!!  But
> > looking at the access table in the AP, there is nobody else on. But
> > the IP addresses are in the same LAN space!
> >
> > 4. My LAN was 192.168.0.1. So was my neighbor's LAN. By having the
> > same LAN running on two APs on two networks adjacent to each other,
> > 100% of my packets were being relayed on not only my AP but their AP
> > and vise-versa.
> >
> > 5. I changed my LAN to another subnet, (ie, 192.168.10.1) and that
> > immediately addressed that. The activity lights quieted immediately
> > AND the throughput increased back to normal levels.
> >
> > So, this does bring up an observation. Even though BOTH WiFi systems
> > were running WPA, using WireShark, which is a packet-sniffer, I was
> > able to see the packets from their network. I couldn't access the
> > Internet through their network, but I could see every website and
> > packet that flowed to/from their computers from their WiFi AP. In
> > essence, by not only being on the same channel, but being in the same
> > IP addresses, I was able to spoof their AP and see their information.
> > Of course, this went both ways!
> >
> > Therefore, what I recommend is not only changing the standard settings
> > of the WiFi AP from "LinkSys" or whatever it defaults to from the
> > factory, but also changing the LAN from the default to some
> > neighboring range.
> >
> > AG
> > --
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> >
> >
>
> --
> _________________________________________________________________
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> Themed Olympus Photo Exhibition: http://www.tope.nl/
>
>
-- 
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