40 Certification Study Guide: IBM Tivoli Access Manager for e-business 6.0
2.2.5 Plug-In for Edge Server
The Access Manager Plug-In for Edge Server is a plug-in for the Edge Server
Caching Proxy component of the IBM WebSphere Edge Server. It adds Access
Manager authentication and authorization capabilities to the proxy, and in certain
scenarios it provides an alternative to WebSEAL for managing access to Web
content and applications.
While the Plug-In for Edge Server shares many of the same capabilities as
WebSEAL, its configuration is different. However, architecturally, it fits into most
Access Manager scenarios in the same manner as WebSEAL.
Among other differences is one key differentiator between the plug-in and
WebSEAL: the plug-in can be used in both forward and reverse proxy
configurations, while WebSEAL only supports a reverse proxy.
The plug-in also integrates with the IBM WebSphere Everyplace® Suite and
supports forms-based login and Access Manager WebSEAL fail-over cookies.
Figure 2-6 provides a simplified view of the Plug-In for Edge Server architecture
used as a reverse proxy (a forward proxy scenario is virtually identical, except
that the proxy operations are to the outside rather than back-end servers).
Figure 2-6 Plug-in for Edge Server architecture
Browser
Edge Server
Caching Proxy
Authentication
Services
Backend
servers
HTTP/HTTPS
Requests
HTTP/HTTPS
Responses
Authorization
Engine
Access
Manager User
Registry
Authorization
Database
Web
Server
Web
Server
Web
Server
Edge
Server
Plug-in

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