[Winpcap-users] Installation question

Dedalus ulysse at email.it
Thu Jun 28 16:06:43 GMT 2007

Hi Gianluca.
Thanks for your explanation: it is very very clear!!


Il 28/06/2007 17.39, Gianluca Varenni ha scritto:
> Dedalus,
> I'm not familiar with the  Jetico Personal Firewall, so my answer is 
> based on how I think this firewall software works. Most of these 
> personal firewalls use an NDIS intermediate driver (NDIS IM driver) to 
> filter packets. These filters sit between your network card driver and 
> the protocol drivers like tcp/ip, the WinPcap capture driver (npf) and 
> netmon (another protocol driver from Microsoft that we use to capture 
> from dialup and vpn connections).
> When a new protocol driver gets installed, several times the OS 
> recomputes the bindings between network card drivers, IM drivers and 
> protocol drivers, causing (in your case) the rebinding of the "Jetico 
> Personal Firewall Network Monitor" on top of some the network card 
> drivers and the usual "driver not signed" warning from XP. In 
> practice, WinPcap is not directly responsible for the warning, and 
> it's not actually a reinstallation/overwriting of the Jetico Personal 
> Firewall drivers, it's a rebinding process taking place.
> I hope this explains what happened during the WinPcap installation.
> BTW, if you happen to install another network card on your machine, 
> you will probably see the "unsigned driver" dialog popping up again, 
> as part of the rebinding process.
> Have a nice day
> GV
> ----- Original Message ----- From: "Dedalus" <ulysse at email.it>
> To: <winpcap-users at winpcap.org>
> Sent: Wednesday, June 27, 2007 11:46 PM
> Subject: [Winpcap-users] Installation question
>> Hi at All.
>> I use Jetico Personal Firewall (now it is release and as OS 
>> Windows Xp sp2 Professional. Today I try to install WinPCap 4.0 and 
>> during the installation process I have received two messages that 
>> warning me for "Jetico Personal Firewall Network Monitor" unsigned 
>> drivers (Windows Xp feature).
>> I have cancel the installation of the two "Jetico" drivers.
>> The installation process should be to recognize that Jetico it is 
>> already installed and not overwrite my "Jetico Personal Firewall 
>> Network Monitor" drivers!
>> Ciao
>> _______________________________________________
>> Winpcap-users mailing list
>> Winpcap-users at winpcap.org
>> https://www.winpcap.org/mailman/listinfo/winpcap-users 
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> Winpcap-users at winpcap.org
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