No prob, I appreciate your help.

When I try your first solution with MAC address, it works when I send it to 
my local router - I see replies.
But when I try to modify ICMP message as you said, Wireshark shows Ethernet 
FCS incorrect. So which value should I change?

Thanks!

Peter

Dňa streda, 25. novembra 2015 12:42:22 UTC+1 Vadim Kochan napísal(-a):
>
> On Wed, Nov 25, 2015 at 01:03:07PM +0200, vkochan wrote: 
> > On Wed, Nov 25, 2015 at 02:51:31AM -0800, Peter Halaška wrote: 
> > > Hello, 
> > > 
> > > I'm having some problems with trafgen. 
> > > When I try to send an echo request packet to my localhost, I see it 
> without 
> > > any problems, but there is no *echo reply *(see attached screen). 
> > > I'm using cfg file which I found here 
> > > http://www.draconyx.net/articles/trafgen-expression-language.html 
> with SRC 
> > > & DST IP changed. 
> > > Please, do you know where could be the problem? 
> > > When I try exact thing with hping3, it works as it should - with echo 
> > > replies. 
> > > 
> > > Thank you very much. 
> > > 
> > > -- 
> > > You received this message because you are subscribed to the Google 
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> > 
> > Hi Peter, 
> > 
> > I think you should also modify source MAC address. 
> > 
> > Regards, 
> > Vadim Kochan 
>
> Peter, again, sorry for such a flood with idiotic advises from my side, 
>
> I tried this example and I had the same issue it on my host until I 
> changed ICMP message size to 48 bytes. 
>
> ... 
>
> /* ICMP Message */ 
> fill(0x58, 48), 
> } 
>
> Regards, 
> Vadim Kochan 
>

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