Filter out a string using a display filter

["Panagiotis Georgopoulos" <panos () comp lancs ac uk>]

Hello all,

 

                In my captures I see  *a lot* of probe request and probe
responses packets (IEEE 802.11 protocol) that make my debugging really
difficult. How can I filter out all these packets using a display filter ? 

 

I've tried creating a filter expression using e.g. the "probe request"
string but it doesn't work.. It seems that I am unable to find the exact
filed of 802.11 in the expressions list so I think I am looking to a filter
more generic, such as "show me all the packets that do not contain the
phrase "probe request" or "probe response" ". Any ideas?

 

                Thanks a lot,

                Panos

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