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Invalid capture filter error message in wireshark

Posted on 2010-11-10
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Last Modified: 2012-05-10
Matteo I'm having the same problem, but when I try to use the filter smtp.rsp.parameter contains "Authentication Unsuccessful" in wireshark I just get an error message that says Invalid Capture filter. what to do?

Please see attached image.
invalid-capture-filter.jpg
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Question by:bobox00
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yasserd earned 500 total points
ID: 34108678
This is a display filter NOT a capture filter. That means AFTER capturing the data you can use this filter to display only what you wanted.

I don't think that you can use a capture filter to do exactly what you want but it is possible to reduce the number of captured packets using specific capture filters (like capturing only tcp on port 25).

If you're using winPcap engine, you'll find filtering syntax here: http://www.winpcap.org/docs/docs_412/html/group__language.html
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by:bobox00
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Thanks!
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