Chapter 12 Configuring Classic Policies and Expressions 205
For a complete list of protocols and qualifiers, see “Classic Expressions,”
on page 224. The following choices appear for the HTTP protocol:
•METHOD. Filters HTTP requests that use a particular HTTP
method.
•URL. Filters HTTP requests to a specific Web page.
•URLQUERY. Filters HTTP requests that contain a particular query
string, choose URLQUERY as your qualifier.
•VERSION. Filters HTTP requests to a particular host.
•HEADER. Filters based on a particular HTTP header.
•URLLEN. Filters based on the length of the URL.
•URLQUERY. Filters based on the query portion of the URL.
•URLQUERYLEN. Filters based on the length of the query portion
of the URL only.
5. Under Operator, choose the operator for your policy expression. For a
complete list of choices see the Operators table in “Classic Expressions,”
on page 224. Some common operators are:
6. If a Valu e text box appears, type a string or numeric value, as appropriate.
For example, you chose REQ as the Flow Type, HTTP as the Protocol, and
HEADER as the qualifier, type the value of the header string in the Valu e
Operator Description
== Matches the following string exactly, or is exactly equal to
the following number.
!= Does not match the following string.
>Is greater than the following number.
<Is less than the following number.
>= Is greater than or equal to the following number.
<= Is less than or equal to the following number.
CONTAINS Contains the following string.
CONTENTS The contents of the designated header, URL, or URL query.
EXISTS The specified header or query exists.
NOTCONTAINS Does not contain the following string.
NOTEXISTS The specified header or query does not exist.