![]() However, if you know the TCP port used (see above), you can filter on that one. You cannot directly filter FTP protocols while capturing. Show only the FTP based traffic: ftp Capture Filter The master list of display filter protocol fields can be found in the display filter reference. The basics and the syntax of the display filters are described in the User's Guide. Display FilterĪ complete list of FTP display filter fields can be found in the display filter reference Wireshark uses display filters for general packet filtering while viewing and for its ColoringRules. Keep it short, it's also a good idea to gzip it to make it even smaller, as Wireshark can open gzipped files automatically. XXX - Add a simple example capture file to the SampleCaptures page and link from here. There are no FTP specific preference settings. XXX - Add example traffic here (as plain text or Wireshark screenshot). However, the FTP data port is negotiated through the control port and will typically vary in an "unpredictable" manner. The well known TCP port for FTP control is 21 and for FTP data is 20.
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