Citrix Systems 9.2 Benutzerhandbuch

5.

In the Priority field, set the priority.

6.

If you are binding policy to a Content Switching virtual server, in the 
Target field select a load balancing virtual server to which traffic that 
matches the policy is sent.

7.

Click OK.

Named classic expressions are expressions that are given a name and can be used 
in any classic policy. Some named expressions are built-in, and a subset of these 
are read-only. You can also configure new named classic expressions.

Built-in named expressions fit into one of four categories: General, Anti-Virus, 
Personal Firewall, and Internet Security. General named expressions have a wide 
variety of uses, including the following:

•

Allowing a value of TRUE or FALSE to always be returned for all traffic. 
The general named expressions ns_true and ns_false provide these 
options.

•

Identifying data of a particular type (for example, .htm, .doc, or .gif files).

•

Determining the presence of caching headers.

•

Determining whether a round trip between a client and the NetScaler is 
slow (over 80 milliseconds).

Anti-Virus, Personal Firewall, and Internet Security named expressions test 
clients for the presence of a particular program and version and are used primarily 
to create Access Gateway policies. 

For descriptions of the default named expressions, see 

. 

You cannot modify or delete built-in named expressions.

1.

In the navigation pane, expand AppExpert, expand Expressions, and then 
click Classic Expressions.

2.

In the details pane, click Add. 

Note that some of the built-in expressions in the Expressions list are read 
only.