[Winpcap-users] winpcap device list "emtpy"

Gianluca Varenni gianluca.varenni at cacetech.com
Tue Nov 28 16:25:13 GMT 2006

Did the reinstallation fix the problem?

If so, it's definitely possible that some update or some 
antivirus/malware/... software decided that the winpcap driver (npf.sys) was 
bad and removed it.

Have a nice day

----- Original Message ----- 
From: "Michael Marschalkowski" <grinch at itg-em.de>
To: <winpcap-users at winpcap.org>
Sent: Tuesday, November 28, 2006 12:53 AM
Subject: [Winpcap-users] winpcap device list "emtpy"

> Hi,
> this is my first post on this mailinglist and I guess/hope it's only a
> little problem to solve.
> I've written a little program that monitors a Windows 2003 EE SP1 (traffic
> accounting). The server has 2 real network cards and 1 TAP device 
> (OpenVPN).
> But since Nov 24 it does not list those devices (retrieved by
> pcap_findalldevs). The only device listed is the "generic dialup adapter"
> (winpcap 3.1) or "Adapter for generic dialup and VPN capture" (4.0b2).
> WinDump -D also only lists this device, so I think this is not a problem
> with my program but something is wrong with winpcap.
> I'm not Adminstrator of this machine (but I do have Administrator rights, 
> so
> that's not the problem :)), so I can't really tell what was done. The 
> person
> responsible for this server only told me, that he did some (all?) updates
> and since then the program refused to start. He gave me a little list with
> the installed updates, maybe that is useful to you:
> KB922582
> KB920213
> KB922819
> KB923191
> KB923414
> KB923980
> KB924191
> KB917537
> KB920685
> Before those updates winpcap worked fine and listed all devices.
> What I've done for now is reinstalling WinPcap 3.1 and installing WinPcap
> 4.0b2. The network cards are running and IPs are configured (I'm accessing
> the server via RDP).
> Any ideas? What went wrong or better, how do I fix it ;)
> If you need more information, let me know.
> best regards
> Michael
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> Winpcap-users at winpcap.org
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