Hi,
The parameters for the log is like below:
![66fe6e721bcc470784abe414d54d1eb9_RackMultipart20171228-47100-1215j4n-20171228_113344_inline.jpg 66fe6e721bcc470784abe414d54d1eb9_RackMultipart20171228-47100-1215j4n-20171228_113344_inline.jpg](/t5/image/serverpage/image-id/4722i3B6B6146F07B34F2/image-size/large?v=v2&px=999)
Therefore, if you want to use match condition with "string" parameter, you should use one of "string" parameters in the log (there are three string parameters in the log, %0%, %1% and %5%).
For example with your way, I think you can use %0% string (i.e. "MAC") as below:
configure log filter "DefaultFilter" add exclude events "nl.ClientAuthenticated" match string "MAC"Otherwise, you can also use other match condition, "mac-address", "ports" or "vlan" instead of "string" parameter.
Regards,