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Re: [lwip-users] windows 7, IPv6, and WiFi

From: Zach Smith
Subject: Re: [lwip-users] windows 7, IPv6, and WiFi
Date: Tue, 9 Jul 2013 16:03:23 +0000

We've tried a PC that fails in the 1st topology and it works in the 2nd 
We'll double check the addresses and stuff.  I think you are right about 
Wireshark is seeing the packet but the stack is not passing it on for some 
reason but I can't figure out why.


-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of Pomeroy, Marty
Sent: Tuesday, July 09, 2013 9:20 AM
To: Mailing list for lwIP users
Subject: Re: [lwip-users] windows 7, IPv6, and WiFi

>> Interestingly, we can't get communication with our setup like this:
>> [Win7 PC] --- (wired Ethernet) --- (Intranet) ---(wired Ethernet) ---
[wireless router] --- (WiFi) --- [Embedded device]

>> But if we try a setup like this then it works:
>> [Win7 PC] --- (WiFi) --- [Wireless Router] --- (Embedded device]

Have you tried a "working" PC in the both topologies, and a "failing" PC in 
both topologies?  If the "failing" PC fails both ways, and the "working" PC 
works both ways, check for a firewall program on the PC.
If they both fail in one topology and work in the other, then check addresses 
and masks and stuff.  It could be that Wireshark is seeing the packet 
(promiscuous) but the stack is not passing it on because of the mask or 

Also, just in case - I found that when Visual Studio is running a program, it 
can bypass a firewall, but then if you shut down VS and just run the program, 
you can have firewall issues.

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