H3C Technologies H3C SecBlade IPS Cards - Manual (Page 198)

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Parameter Description Required/optional
Protocol_regex
Regular expression of the user-defined protocol. The
parameter is used for further filtering the protocols matching the
fixed string.
The parameter is a string of 8 to 255 characters, excluding the
space before or after the string.
Optional
Protocol_end
End line of the user-defined protocol.
Each user-defined protocol must end with Protocol_end.
Required