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I am trying to analyze ftp traffic in Wireshark. I can see commands like Request: List, PORT. But after FTP

Response 150: Opening data channel for directory list.

what I see immediately is

Response 226: Transfer OK

where is a list of files? Why I don't see it? (I've got this list - I can see it in terminal)

2

You're following a single TCP connection. FTP data transfers occur over a second connection. Stop following the connection (or filtering) and you should see the data transfer, assuming you didn't use capture filters and actually captured it.

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  • I tried this way but cannot find it. What filters might help? I tried by port 21 and second port of connection – user107788 Jul 7 '13 at 22:10
  • As I already said, you'll miss it if you filter by port 21. Try not filtering at all, or filtering by IP address. – Michael Hampton Jul 7 '13 at 22:11
  • I ve found, forget that data comes from port 20. One question: this stream comes to also different port on ftp client but I cannot find where client passed this info to FTP server. Is this that number passed with Port request? – user107788 Jul 7 '13 at 22:27
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    It sounds like you need to go read how the protocol works. – Michael Hampton Jul 7 '13 at 22:31
  • It might be more complicated in this case because it goes from my machine through TP-Link to my server and back. In FTP-Data frame I see TP-Link as source, not server which is behind TP-Link – user107788 Jul 7 '13 at 23:34
0

In wireshark, use the display filters as -

ftp || ftp-data

This should allow you to see both, the file listing and the commands. Make sure you don't have any capture filters.

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