1. 3/5/2016Faculty : Trần Thị Ngọc Hoa1 From Proxy Server To ISA 2006  Overview  History  Functions  Caching Process  Caching Types  How does it work  Lab Demo

2. Proxy Server  A proxy server is a device that services client requests by forwarding : the requests to the destination server. The requests appear to come from the proxy server and not from the client. the reply from the destination server back to the client. The response is served to the client by the proxy server.  This technology provides : a central management point to inspect and filter all incoming and outgoing traffic additional security by isolating the internal clients from the external network. 3/5/2016Faculty : Trần Thị Ngọc Hoa2

3. Proxy Server ( cont )  The main advantages of using a proxy server are: Hiding internal IP addresses Caching HTTP objects, which improves the client application performance Access control, which allows more granular control over Internet access 3/5/2016Faculty : Trần Thị Ngọc Hoa3

4. The History Of MS Proxy Server  Proxy Server 1.0 was released in 1996. Banner “The Only Proxy Server Fully Integrated with Windows NT Server.” ( >< Netscape Proxy server ) Allow Internet-based access to the server-local IIS Web sites, but was unable to publish internal Web sites to the Internet. Support ended March 2002. 3/5/2016Faculty : Trần Thị Ngọc Hoa4

5. The History Of MS Proxy Server  Proxy Server 2.0  December 1997.  Architecturally similar to Proxy Server 1.0, it nonetheless brought with it several new features as proxy array, server publishing …  Support for Proxy Server 2.0 ended December 2004. 3/5/2016Faculty : Trần Thị Ngọc Hoa5

6. The History Of MS Proxy Server  Internet Security and Acceleration (ISA) Server 2000  December 2000.  All of the Web Proxy functionality was now completely self-contained in a new service called the Web proxy.  The first proxy/firewall product  Windows Server 2000 ONLY  Will end support completely in May 2011. 3/5/2016Faculty : Trần Thị Ngọc Hoa6

7. The History Of MS Proxy Server  Internet Security and Acceleration (ISA) Server 2004 Standard edition in June 2004 and Enterprise edition in January 2005, Windows Server 2000 or 2003  Internet Security and Acceleration (ISA) Server 2006 July 2006. Windows Server 2003 SP1 / R2 FULLY INTEGRATED FIREWALL PRODUCT 3/5/2016Faculty : Trần Thị Ngọc Hoa7

8. Functions of a Proxy Server  A proxy server offers four main functions: Forward proxy Reverse proxy Proxy chaining Caching 3/5/2016Faculty : Trần Thị Ngọc Hoa8

9. Forward Proxy  Allows client computers in protected networks to connect to the Internet by Intercepting their requests and forwarding them to the destination server Relaying the reply back to the client 3/5/2016Faculty : Trần Thị Ngọc Hoa9

10. Reverse Proxy  A reverse proxy server passes the request from the Internet to an internal network resource  The most common form of reverse proxy is publishing Web services to the Internet.  A proxy server can redirect or deny the request based on the policy rule created by the administrator. 3/5/2016Faculty : Trần Thị Ngọc Hoa10

11. Proxy Chaining  A proxy server makes use of one or more proxy servers to handle proxy requests. 3/5/2016Faculty : Trần Thị Ngọc Hoa11

12. 3/5/2016Faculty : Trần Thị Ngọc Hoa12 Overview of Caching  One of the most important functions of ISA Server  A proxy server can cache requests from Internet users trying to access published Web servers as well as cache requests from internal users trying to access content from the Internet  This provides a faster browsing experience to the clients as well as saving important network bandwidth.

13. 3/5/2016Faculty : Trần Thị Ngọc Hoa13 Caching Process www.hui.edu.vn www.hui.edu.vn http://www.hui.edu.vn http://www.hui.edu.vn

14. 3/5/2016Faculty : Trần Thị Ngọc Hoa14 Caching Types

15. 3/5/2016Faculty : Trần Thị Ngọc Hoa15 Caching Function

16. 3/5/2016Faculty : Trần Thị Ngọc Hoa16 Inaccessible Objects

17. 3/5/2016Faculty : Trần Thị Ngọc Hoa17 Demo Configuration