Wireshark-users: Re: [Wireshark-users] Does Wireshark modify the Ethernet Interface in ANY way while capturing?

From: Sake Blok <sake@xxxxxxxxxx>
Date: Wed, 9 Jul 2008 16:55:04 +0200

On Tue, Jul 08, 2008 at 05:16:59PM +0200, Michael wrote:
> 
> I've got a little Problem. I'm trying to send an AT-Command via TCP to a 
> Satellite Terminal. As I have never done that before, I just wrote a 
> little Script for testing that. And now the following happens. If I just 
> let my script run, I get a timeout while reading the answer from the 
> Terminal. So, I wanted to have a look at the sent Packets and started 
> Wireshark, started my Script again - and this time it works. I ran some 
> more tests, and the thing is, when wireshark is running - my script 
> works, if wireshark does not run, I get a timeout.
> So my question is, does Wireshark modify the Ethernet interface with 
> some options? Or what could explain this behaviour? I'm at quite a loss 
> with this situation and would appreciate any hint or help that could 
> help me solve this particular problem.

If you disable promiscuous mode in Wireshark when you start the capture,
does your application also work?

Cheers,
    Sake