Wireshark-users: Re: [Wireshark-users] Trouble with "contains" filter!

From: Gerald Combs <gerald@xxxxxxxxxxxxx>
Date: Mon, 19 Jul 2010 12:11:54 -0700
George Vandelet wrote:
> I have rececently found the "contains" filter in wireshark which is VERY
> powerful.  For instance, if I only want to see http packets that contain
> the string "SOAP" I could used the filter "http contains SOAP". 
> However, if I wish to use the filter to show http packts that DONT
> contain the string SOAP, I can not do it!  I have tried using the
> following without success.
>  http contains !(SOAP)
>  http contains !SOAP
>  http !contains SOAP
>  
>  Does anyone know a way to negatiate the "contains" filter?

Try

    http and not http contains "SOAP"

You can also use "matches" which allows regular expressions including
case-insensitive matching:

    http and not http matches "(?i)soap"