Ethereal-users: Re: [Ethereal-users] Missing Trace entries

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From: "Gianluca Varenni" <gianluca.varenni@xxxxxxxxx>
Date: Fri, 26 Aug 2005 11:02:52 -0700
Hi.

Are you using the latest version of WinPcap (3.1 final) on both the machines?

If not, and you are using some personal firewall/antivirus software on your machine, you could have problems capturing the traffic originated by your PC because of a bug in WinPcap that has been fixed in WinPcap 3.1.

Have a nice day
GV

----- Original Message ----- From: "Guy Harris" <gharris@xxxxxxxxx>
To: "Ethereal user support" <ethereal-users@xxxxxxxxxxxx>
Sent: Friday, August 26, 2005 10:52 AM
Subject: Re: [Ethereal-users] Missing Trace entries


Prize Jose wrote:

The network adapter that I am capturing is ' Broadcom NetXtreme Gigabit
Ethernet Driver '.

I.e., the network adapter on your Windows 2000 PC - the machine running Ethereal - is a Broadcom NetXtreme Gigabit Ethernet adapter?

But I get all the 'to and from' packets on my PC which is a windows 2000
and Intel 8255x-based Integrated Fast Ethernet. I am on a different network
too.

I.e., you have *another* PC, which has an Intel 8255x-based Ethernet adapter, and on *that* PC you see traffic being sent by that PC, as well as traffic being sent to that PC?

Do you have any other thoughts to add on why 'source' packets are missing
on 'Broadcom NetXtreme Gigabit Ethernet Driver'.

If:

when you run Ethereal on the PC with the 8255x-based adapter, you see traffic to and from the PC;

when you run Ethereal on the PC with the Broadcom NetXtreme adapter, you see traffic to the PC but not from the PC;

then the problem is probably with the adapter or its driver - it might not be supplying transmitted packets in promiscuous mode. Try capturing with promiscuous mode turned off. If *that* doesn't work, the driver is probably not even supplying them in "all local packets" mode.

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