[Bridge] connecting PDA (wlan) to Linux laptop with bridged connections (eth + wlan) ...

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On Tue, 29 Mar 2005 16:43:11 -0500
"Sandeep Khanna" <sandeep.khanna@xxxxxxxxxxxxx> wrote:

> Hi All,
> 
> After hours of reading and trials, I got the following setup working...
> 
> 1. Dell Axim X30 PocketPC with 802.11b wireless using DHCP with Open WEP
> 
> -- successfully connected to -->
> 
> 2. Laptop with DLink Airplus DWL-650+ PCMCIA wireless with ndiswrapper
> v1.1 driver with network bridge (wired + wireless) and running a DHCP
> server listening on interface br0 (eth0 + wlan0)
> 
> Here is the situation:
> - The Dell Axim X30 PDA shows connected to the laptop in Ad-Hoc wireless
> mode.
> - It successfully gets an MAC address based IP address from the DHCP
> server running on the laptop.
> - I can successfully ping the PDA (10.3.2.209) from the
> laptop(10.3.2.175).
> - I can successfully ping the laptop(10.3.2.175) from the
> PDA(10.3.2.209).
> - When I open a browser on the PDA and try to open www.dell.com, tcpdump
> shows the following: 
> 
> 16:26:09.XXXXXX arp who-has 10.47.12.29 tell 10.3.2.209
> 16:26:10.XXXXXX arp who-has 10.47.12.27 tell 10.3.2.209
> 
> The above shows:
> time | protocol | who-has | Nameserver | tell | source IP address (PDA)
> 
> - Internet browsing using the above Nameservers(10.47.12.29,
> 10.47.12.27) works on the laptop but apparently the PDA doesn't seem to
> even know about the Nameservers(10.47.12.29, 10.47.12.27)!!
> 
> Going forward, if the above the setup works then, I would be able to
> browse Internet, use ActiveSync and more on my PDA not only in office
> (laptop eth0 active) but also at home (laptop wlan0 active).


Since you only really want to handle one device and a limited range of protocols
you probably would have better success with routing and/or socks. The problem
is that most wireless interfaces don't allow source address spoofing.

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