If we already know what the field name is, we can get the full display filter by searching for it. Tshark -G will print all protocols, so you can use it in conjunction with grep to find fields of interest. Sometimes you know the protocol you’re looking for, just not the relevant fields you need to filter with. If you like C-style syntax, you can also use & instead of and and || instead of or. įor example, source MAC address becomes eth.src. tcp.dstport != 80: Destination tcp port is NOT 80įor the table below, create a filter by joining the relevant header and word below it with a.Layers 2-4įor any major protocol, there is query for each direction and either. If you create a filter and want to see how it is evaluated, dftest is bundled with Wireshark. Single quotes are recommended here for the display filter to avoid To use a display filter with tshark, use the -Y 'display filter'. Introduction to Display Filtersĭisplay filters allow you to use Wireshark’s powerful multi-pass packet processing capabilities. Hak5’s video on Display Filters in Wireshark is a good introduction. If you are unfamiliar with filtering for traffic, Filter with Regex: matches and containsĭisplay Filters are a large topic and a major part of Wireshark’s popularity.
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