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ProxySG Content Policy Language Guide

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Filter-Part Components

The filter part of a filter file can contain the following:

•

Filters that are not part of a section

•

Sections

•

ALL statements

•

default_filter_properties

 statements

•

Access-control list (ACL) definitions

Filters that are not part of a section must occur before the first section. The 

default_filter_properties

 statements must be written after the last filter or section. The ALL 

statements and ACL definitions can be written anywhere before the 

define_actions

 line. All of these 

components are optional. 

Filters

In CPL, the concept of a filter has been replaced by the concept of a rule.

A filter is a line that includes, at a minimum, a URL pattern. The filter is considered to be a match if 
the requested URL matches the URL pattern. It can also include a tag specifying whether the match 
will be case-sensitive, an 

acl

 condition expression for specifying a defined access-control list, and a 

property setting. Multiple 

acl

 conditions and property settings can be listed. A filter line has the 

following general syntax:

url_pattern [case_insensitive = { yes | no }] [acl=expression] [property=value] 

...

where 

 is either a prefix-style pattern (like the 

 used in the 

url=

 

condition) or a regular-expression pattern (as is used in the 

url_regex

=

 condition, see 

"Sections" on page 303). For more information on URLs, see "url=" on page 137.

case_insensitive= {yes|no}

where 

case_insensitive

 is an optional property that can specify whether URLs matches are 

case-sensitive. By default, matching is case-sensitive. For more information, see "Properties" 
on page 301.

acl=expression

where 

acl=

 can include an IP address or subnet, or the label of a define acl definition 

block. For more information, see "Conditions" on page 301.

where

 property=

 is an optional property setting. For a list of properties available in filter 

files, see "Properties" on page 301.

The following are differences with CPL:

•

Property settings have the form 

 in filter files, instead of the CPL form 

.