Microsoft® Forefront® Threat Management Gateway (TMG) Administrator’s Companion

Appendix D. WPAD Script CARP Operation

• CARP Logic 973

• CARP Action Examples 975

• Summary 980

As described in Chapter 15 the WPAD script provides multiple behaviors for the Web Proxy client, depending on the destination host and the Microsoft Forefront TMG configuration options you choose. In this appendix, you’ll gain a detailed understanding how the WPAD script CARP algorithm operates and see multiple real-life examples of this functionality.

CARP Logic

In Chapter 15 you learned that there are four paths through the WPAD script: direct, normal CARP, client CARP, and no CARP. Chapter 15 concentrated on the direct connection and introduced the CARP scenarios. Figure D-1 illustrates CARP logical flow.

Figure D-1. CARP logical flow

To summarize the diagram ...