you described a typical situation when an in-the-middle ad-hoc node does not forward packets back and forth.
Daihinia solves exactly this problem, please see at http://daihinia.com

> On Monday, June 11, 2007 10:01 PM DrPasto wrote:


> Trying to set up peer to peer (ad hoc)connection among three computers.
> Run into problems with the first two, a laptop(B)(XP Home) connected to a
> desktop (A)(XP Pro) using WiFi connection.
> After consulting 20000 pages of advises the set up is as follows:
> B can ping A, and My Network places at B shows and can access the
> shared files of A.
> A can not ping B. The reply varies: "Request Timed Out" or
> "Ping request could not find host". The routing table
> of B has only its own address, no address of B anywhere.
> WiFi of A shows "Connect." Wifi of B shows "Acquiring network address"
> continuously.
> How should I solve this problem?
> Many thanks for any guidance.



>> On Monday, June 11, 2007 11:48 PM Jack \(MVP-Networking\). wrote:


>> Hi
>> The best solution would be getting an Access Point (or a Wireless Cable/DSL
>> Router if Internet is involved). Ad- Hoc solution is many time quirky and
>> not very safe (Most Ad- Hoc is limited to WEP).
>> Giving the prices of Wireless Routers there is no point to be "tortured"
>> Ad-Hoc peculiarities.
>> Jack (MVP-Networking).
>>
>> "Dr. Pastor" <DrPastor@discussions.microsoft.com> wrote in message
>> news:4038215D-67DC-4A61-B9DA-7E73A08831F9@microsoft.com...



>>> On Tuesday, June 12, 2007 10:31 AM DrPasto wrote:


>>> Thank you for your reply.
>>> Sadly, I must have ad hoc WiFi.
>>> It will be used infrequently and no internet will be used.
>>> Could you recommend any specific document
>>> to guide me?



>>>> On Tuesday, June 12, 2007 2:17 PM Lem wrote:


>>>> Dr. Pastor wrote:
>>>>
>>>> A little dated, but the basic principles are still the same:
>>>> http://www.microsoft.com/windowsxp/u...02april08.mspx
>>>>
>>>> As Jack noted, ad hoc wireless networks are not very secure, so use it
>>>> for what you need to do and then disable it.
>>>>
>>>> --
>>>> Lem MS MVP -- Networking
>>>>
>>>> To the moon and back with 64 Kbits of RAM and 512 Kbits of ROM.
>>>> http://en.wikipedia.org/wiki/Apollo_Guidance_Computer



>>>>> On Tuesday, June 12, 2007 3:29 PM Barb Bowman wrote:


>>>>> I'm not having much luck getting agreements to edit this to include
>>>>> a disclaimer that 5 years ago, there weren't instant WEP hacking
>>>>> tools available, etc.
>>>>>
>>>>> 2002 is a different era.
>>>>>
>>>>> On Tue, 12 Jun 2007 14:17:04 -0400, Lem <lemp40@hotmail.com> wrote:
>>>>>
>>>>> --
>>>>>
>>>>> Barb Bowman
>>>>> MS Windows-MVP
>>>>> Expert Zone & Vista Community Columnist
>>>>> http://www.microsoft.com/windowsxp/e...ts/bowman.mspx
>>>>> http://blogs.digitalmediaphile.com/barb/



>>>>>> On Tuesday, June 12, 2007 4:20 PM Jack \(MVP-Networking\). wrote:


>>>>>> Yap, I use to link a lot to the page. I now find myself double thinking
>>>>>> before using it because of the security issue.
>>>>>> Jack (MVP-Networking).



>>>>>>> On Tuesday, June 12, 2007 4:25 PM DrPasto wrote:


>>>>>>> Thank you Sir.
>>>>>>> Thank you Mademoiselle.



>>>>>>>> On Tuesday, June 12, 2007 4:26 PM Lem wrote:


>>>>>>>> Maybe we should just say that if they insist on using ad hoc wifi, they
>>>>>>>> should make sure that all nodes are inside a Faraday cage. See
>>>>>>>> http://www.imdb.com/title/tt0120660/ for details.
>>>>>>>>
>>>>>>>>
>>>>>>>> Jack (MVP-Networking). wrote:
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>> Lem MS MVP -- Networking
>>>>>>>>
>>>>>>>> To the moon and back with 64 Kbits of RAM and 512 Kbits of ROM.
>>>>>>>> http://en.wikipedia.org/wiki/Apollo_Guidance_Computer



>>>>>>>>> On Tuesday, June 12, 2007 4:36 PM Barb Bowman wrote:


>>>>>>>>> routers are sooooooooo cheap.
>>>>>>>>>
>>>>>>>>> On Tue, 12 Jun 2007 16:26:28 -0400, Lem <lemp40@hotmail.com> wrote:
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>>
>>>>>>>>> Barb Bowman
>>>>>>>>> MS Windows-MVP
>>>>>>>>> Expert Zone & Vista Community Columnist
>>>>>>>>> http://www.microsoft.com/windowsxp/e...ts/bowman.mspx
>>>>>>>>> http://blogs.digitalmediaphile.com/barb/



>>>>>>>>>> On Wednesday, June 20, 2007 9:30 AM pico Hat wrote:


>>>>>>>>>> When it says Wifi of B shows "Acquiring network address" continuously. It means this B box does not successful acquire the IP address. I think you have set to acquire IP address automatically on this PC. Manually set the IP and other network info on this PC should be able to solve this problem.
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Also check any firewall (Windows fireall, Antivirus firewall) installed on PC and you should temporary disable this feature till you solve the problem.
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Quick link:
>>>>>>>>>>
>>>>>>>>>> Setting Up Ad Hoc Wireless Network in Windows XP
>>>>>>>>>>
>>>>>>>>>> http://www.home-network-help.com/ad-...s-network.html
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Good luck..



>>>>>>>>>>> On Wednesday, June 20, 2007 9:32 AM pico Hat wrote:


>>>>>>>>>>> When it says Wifi of B shows "Acquiring network address" continuously. It means this B box does not successful acquire the IP address. I think you have set to acquire IP address automatically on this PC. Manually set the IP and other network info on this PC should be able to solve this problem.
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> Also check any firewall (Windows fireall, Antivirus firewall) installed on PC and you should temporary disable this feature till you solve the problem.
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> Quick link:
>>>>>>>>>>>
>>>>>>>>>>> Setting Up Ad Hoc Wireless Network in Windows XP
>>>>>>>>>>>
>>>>>>>>>>> http://www.home-network-help.com/ad-...s-network.html
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> Good luck..



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