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This means that theįirst filter expression must be read as "show me the packets for which "exists" operator has the highest priority. Remember that whenever a protocol or field name occurs in anĮxpression, the "exists" operator is implicitly called. Operators can be expressed either through English-like abbreviations or Think of a protocol or field in a filter as implicitly having theįields can also be compared against values. To see all packets that contain a Token-Ring RIF field, use Protocol, the filter would be "ip" (without the quotation marks). If you want to see all packets which contain the IP The simplest filter allows you to check for the existence of a FILTER SYNTAX Check whether a field or protocol exists Reference of filter fields can be found within Wireshark and in the displayįilter reference at. Generation and packet list colorization (the latter is only available to Let you compare the fields within a protocol against a specific value,Ĭompare fields against fields, and check the existence of specified fieldsįilters are also used by other features such as statistics Your filter, then it is displayed in the list of packets. If a packet meets the requirements expressed in That helps remove the noise from a packet trace and lets you see only the Wireshark and TShark share a powerful filter engine Wireshark [ -Y "display filterĮxpression" | -display-filter "display filter Wireshark-filter - Wireshark display filter syntax and