Configuring Web proxy chaining
[This topic is pre-release documentation and is subject to change in future releases. Blank topics are included as placeholders.]
Web proxy chaining is implemented with Web chaining rules, on the Web Chaining tab of the Networks node in Forefront TMG Management.
When you install Forefront TMG, a default Web chaining rule is configured. This rule is initially configured so that all requested objects are retrieved from the Internet and not redirected to an upstream server. You can modify the properties of this rule, but you cannot delete it.
You create a Web chaining rule by using the New Web Chaining Rule wizard. After creating the rule, you can modify it and define additional properties. The following table summarizes the settings that you specify when creating a Web chaining rule.
Wizard Page | Value |
---|---|
Welcome |
Specify a unique name for the rule. |
Web Chaining Rule Destination |
Specify the network, IP addresses, URLs, domains, or other Forefront TMG network objects for which you want to route requests. For example, to specify that all Internet requests are routed to an upstream server, specify the destination as the External network. |
Request Action |
Specify how requests are routed:
|
Primary Route |
Specify settings for the primary route, as follows:
|
Backup Action |
If you specify that requests handled by the rule are routed to an upstream server and you have an alternative route to the Internet, you can specify a backup route if the primary upstream server is unavailable. Forefront TMG polls the upstream server at regular intervals to check that the route is available. Configure backup settings to do the following if the upstream server is unavailable:
|
Backup Routing |
If you have configured a secondary upstream server as the backup route, specify the properties for the backup server. These are the same as the properties that you specify on the Primary Route page. |
After creating a Web chaining rule with the wizard, you can configure an additional setting in the property pages of the rule.
Property Page | Value |
---|---|
General |
Enable. Select or clear this setting to enable or disable the rule. |
Important
After configuring Web chaining rules, you must configure access rules on the downstream server to allow traffic to access sites specified in Web chaining rules.
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