tailieunhanh - cya securing exchange server 2003 and outlook web access phần 6

Giả sử bạn cần phải vô hiệu hóa truy cập OWA cho 500 tài khoản người dùng. Bạn sẽ không muốn làm điều này bằng tay, bạn sẽ? Đừng lo lắng, giao diện người dùng tiện lợi ít đồ họa (GUI) dựa trên công cụ ADModify đến để giải cứu. Với ADModify bạn có thể thay đổi số lượng lớn cho các thuộc tính cho các tài khoản người dùng trong rừng | 152 Chapter 6 OWA Front-End Back-End Deployment Scenarios Figure Front-End Server on Internal Network Behind Perimeter Network DMZ with ISA Server Exchange 2003 Behind an ISA Server 2000 This book does not go into detail or provide any step-by-step instructions on how you using a combination of Exchange 2003 and ISA Server can provide your organization with an even more secure messaging environment than provided by the traditional FE BE approach where the FE server s are placed directly in the perimeter network DMZ . Other good books have been written on this subject such as Dr. Tom Shinder s ISA Server and Beyond which is also published by Syngress Publishing ISBN 1931836663 . However we felt it was a good idea to make you aware of the possibilities offered by deploying an ISA Server in your Exchange environment. By THE Book. To provide your organization with a more secure messaging environment Exchange 2003 has been designed to work better with ISA Server than has been the case with previous versions of Exchange. ISA Server is an advanced firewall that controls Internet traffic entering your internal network and outbound communication from your messaging environment. With ISA Server firewalls it s possible to allow secure remote access to Exchange Server services on the internal network. An ISA Server protects Exchange Servers on your internal network using several OWA Front-End Back-End Deployment Scenarios Chapter 6 153 unique features that you won t find on any other firewall. All inbound Internet traffic destined to your Exchange 2003 servers such as OWA RPC over HTTP S OMA POP3 IMAP4 is processed by the ISA Server. This means that when the ISA Server receives a request from an Exchange server on the internal network it proxies the requests to the appropriate Exchange server s . The internal Exchange server s then returns the requested data to the ISA Server and then ISA Server sends the information to the client through the Internet. ISA Server is an .