Policies on the Citrix ADC appliance help identify specific connections that you want to process. The processing is based on the actions that are configured for that particular policy. Once you create the policy and configure an action for it, you must either bind it to a virtual server on the appliance, so that it applies only to traffic flowing through that virtual server, or bind it globally, so that it applies to all traffic flowing through any virtual server configured on the Citrix ADC appliance.
The Citrix ADC appliance SSL feature supports default syntax (advanced) policies . For a complete description of default syntax expressions, how they work, and how to configure them manually, see Policies and Expressions.
Users who are not experienced in configuring policies at the CLI will usually find using the configuration utility considerably easier.
SSL policies require that you create an action before creating a policy, so that you can specify the actions when you create the policies. In SSL default syntax policies, you can also use the built-in actions. For more information about built-in actions, see SSL built-in actions and user-defined actions.
SSL default syntax policies
An SSL default syntax policy, also known as advanced policy, defines a control or a data action to be performed on requests. SSL policies can therefore be categorized as control policies and data policies:
- Control policy. A control policy uses a control action, such as forcing client authentication. Note: In release 10.5 or later, deny SSL renegotiation (denySSLReneg) is set, by default, to ALL. However, control policies, such as CLIENTAUTH, trigger a renegotiation handshake. If you use such policies, you must set denySSLReneg to NO.
- Data policy. A data policy uses a data action, such as inserting some data into the request.
The essential components of a policy are an expression and an action. The expression identifies the requests on which the action is to be performed.
You can configure a default syntax policy with a built-in action or a user-defined action. You can configure a policy with a built-in action without creating a separate action. However, to configure a policy with a user-defined action, first configure the action and then configure the policy.
You can specify an additional action, called an UNDEF action, to be performed in the event that applying the expression to a request has an undefined result.
SSL policy configuration
You can configure an SSL default syntax policy by using the CLI and the GUI.
Configure an SSL policy by using the CLI
At the command prompt, type:
add ssl policy <name> -rule <expression> -Action <string> [-undefAction <string>] [-comment <string>]
Configure an SSL policy by using the GUI
Navigate to Traffic Management > SSL > Policies and, on the Polices tab, click Add.