[Winpcap-users] WinPCAP needed for ALL network connections

[Anshuman Aggarwal]

GV et all,
 This problem got resolved on its own and I just wanted to provide more 
information to all so that we may all learn from it. Please send in your 
theories if any.

My computer is on a corporate active directory domain but was not connected 
for a few months. This time when I was connected to the domain in my home 
office and rebooted, the problem automatically resolved itself and now ALL 
connections work. 

Furthermore, i was experiencing a problem with incoming ports not being open. 
I originally thought it was my ISP but it turned out to be the PC.

I am not sure how the domain login had such a profound affect but could this 
be a group policy kind of thing...

Curiously enough, it appears that WinPCAP helped circumvent it 
somehow...pretty cool

Thanks,


----- Original Message -----
From: "Anshuman Aggarwal" <anshuman at brillgene.com>
To: winpcap-users at winpcap.org
Date: Wed, 26 Apr 2006 11:23:48 -0700
Subject: Re: [Winpcap-users] WinPCAP needed for ALL network connections

> 
> Both :( and Multiple VPN :((
> Cisco VPN, Aventail and Netlimiter Firewall installed 
> BUT it used to work perfectly with all of the above installed...I know the 
> question that I am also asking myself is what changed ...
> 
> I guess one solution is to uninstall ALL of the above ....and see if the 
> connection works then...
> 
> Is it possible that running Winpcap is helping *BYPASS* something that the 
> VPN/Netlimiter Firewall is preventing 
> 
> More Observations:
> - When applications request connections, netlimiter still kicks in and IS 
> ABLE to prevent/allow the comm. through ....HENCE winpcap is not helping 
> bypass that
> - VPN is only started when needed and works fine ON TOP of running 
> connection 
> but DOES NOT work when ethereal is not running
> - ALSO Ethereal does NOT need to be capturing packets (by using filters 
> nothing is captured) it just needs to be *LISTENING* :)
> 
> IMHO, this is an interesting problem of the unusual kind 
> 
> Thanks,
> 
> ----- Original Message -----
> From: "Gianluca Varenni" <gianluca.varenni at cacetech.com>
> To: <winpcap-users at winpcap.org>
> Date: Tue, 25 Apr 2006 20:59:27 -0700
> Subject: Re: [Winpcap-users] WinPCAP needed for ALL network connections
> 
> > Do you have any personal firewall or VPN software installed on this 
> machine?
> > 
> > Have a nice day
> > GV
> > 
> > ----- Original Message ----- 
> > From: <anshuman at brillgene.com (Anshuman Aggarwal)>
> > Sent: Friday, April 21, 2006 10:39 PM
> > Subject: [Winpcap-users] WinPCAP needed for ALL network connections
> > 
> > 
> > >
> > > Hi,
> > > All my network connections (Ethernet, Wireless) only work when I have an
> > > application like Ethereal running which starts the WinPcap capture. The
> > > packets start flowing once the capture is started (even if the filter 
> set
> > > in Ethereal does not actually capture any packets) and stops once the
> > > packet capture is stopped in Ethereal.
> > >
> > > I have tried uninstalling the WinPcap as well as the Network Monitor 
> > > Packet
> > > capture driver.
> > >
> > > Any suggestions?
> > >
> > > Can someone please explain or point to the documentation where the 
> startup
> > > drivers, services around winpcap are explained.
> > >
> > > I am sure somewhere Winpcap has become essential for the TCPIP stack 
> but 
> > I 
> > > am
> > > not sure where and not sure how to find where its getting blocked.
> > >
> > > Thanks much in advance
> > >
> > > Regards,
> > > Anshuman 
> > 
> > _______________________________________________
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> > Winpcap-users at winpcap.org
> > https://www.winpcap.org/mailman/listinfo/winpcap-users
> > 
> > 
> > 
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>