VIRTUAL SERVERS Chapter 7

2 OVERVIEW Exchange Server 2003 virtual servers Virtual servers in a clustering environment Creating additional virtual servers Configuring virtual servers Front-end and back-end configuration Authentication Encryption Diagnostic logging Exchange Server 2003 virtual servers Virtual servers in a clustering environment Creating additional virtual servers Configuring virtual servers Front-end and back-end configuration Authentication Encryption Diagnostic logging

3 EXCHANGE SERVER 2003 VIRTUAL SERVERS HTTP Yes No Default Virtual Server Enabled SMTP NNTP POP3 IMAP4 Yes No

4 VIRTUAL SERVERS IN A CLUSTERING ENVIRONMENT Microsoft Windows Cluster service: Exchange Server 2003 installs as a virtual server Failover to other node Network load balancing: Create identical redundant virtual servers on all nodes Configuration of every server in the cluster must be the same Microsoft Windows Cluster service: Exchange Server 2003 installs as a virtual server Failover to other node Network load balancing: Create identical redundant virtual servers on all nodes Configuration of every server in the cluster must be the same

5 VIRTUAL SERVER REQUIREMENTS Static IP address Network name One or more dedicated physical disks Exchange 2003 Server System Attendant

6 DEFAULT VIRTUAL SERVER CONFIGURATIONS (All Unassigned) Virtual Server TCP Port IP Address SSL Port POP IMAP4 NNTP HTTP SMTP (All Unassigned) N/A

7 POP3 VIRTUAL SERVERS Retrieve a specific user’s mail from the server Access only server inboxes Do not send Can configure the following: Access to specific computers, groups of computers, or domains Authentication (back-end only) Encryption Number of inbound connections Messaging format

8 IMAP4 VIRTUAL SERVERS Very similar to POP3 Do not support uuencode or binhex for Macintosh Can be configured to do the following: List public folders Disable complete public folder listings Enable fast message retrieval Very similar to POP3 Do not support uuencode or binhex for Macintosh Can be configured to do the following: List public folders Disable complete public folder listings Enable fast message retrieval

9 NNTP VIRTUAL SERVERS Access newsgroups Enable Microsoft Outlook users to participate in online discussions Let you assign a moderator to a newsgroup Access newsgroups Enable Microsoft Outlook users to participate in online discussions Let you assign a moderator to a newsgroup

10 NNTP VIRTUAL SERVERS (CONT.) Can be configured to do the following: Define expiration policies Allow control messages Limit inbound connections Include or exclude single computers, subnets, and entire domains Limit the length of time idle connections remain logged on to the server Limit the total size of articles that a user can post during a single connection Limit the size of individual articles that a user can post Encrypt the connection Authenticate users

11 HTTP VIRTUAL SERVERS Exchange virtual server configured using IIS Manager Additional HTTP virtual servers configured using Exchange System Manager Virtual directories provide additional content HTTP virtual servers support OWA Exchange virtual server configured using IIS Manager Additional HTTP virtual servers configured using Exchange System Manager Virtual directories provide additional content HTTP virtual servers support OWA

12 HTTP AND WEBDAV HTTP and Web Distributed Authoring and Versioning (WebDAV) provide access to the following: Documents Applications HTTP and Web Distributed Authoring and Versioning (WebDAV) provide access to the following: Documents Applications

13 SMTP VIRTUAL SERVERS Internet standard for transporting and delivering electronic messages Default SMTP virtual server installed and enabled Can configure the following: Security options Message delivery options Mail relay Message filtering TLS encryption Internet standard for transporting and delivering electronic messages Default SMTP virtual server installed and enabled Can configure the following: Security options Message delivery options Mail relay Message filtering TLS encryption

14 DEMONSTRATION: CONFIGURING THE EXCHANGE VIRTUAL SERVER

15 DEMONSTRATION: CREATING AN ADDITIONAL HTTP VIRTUAL SERVER

16 DEMONSTRATION: CONFIGURING AN ADDITIONAL HTTP VIRTUAL SERVER

17 DEMONSTRATION: CREATING ADDITIONAL POP3, IMAP4, AND SMTP VIRTUAL SERVERS

18 DEMONSTRATION: CONFIGURING THE ADDITIONAL POP3 VIRTUAL SERVER

19 DEMONSTRATION: CONFIGURING THE DEFAULT IMAP4 VIRTUAL SERVER

20 DEMONSTRATION: CONFIGURING THE DEFAULT SMTP VIRTUAL SERVER

21 DEMONSTRATION: CREATING AN ADDITIONAL NNTP VIRTUAL SERVER

22 DEMONSTRATION: CONFIGURING THE ADDITIONAL NNTP VIRTUAL SERVER

23 FRONT-END AND BACK-END CONFIGURATION Provides a unified namespace Reduces SSL overhead Front-end virtual servers handle incoming client connections Back-end virtual servers run the databases Create a virtual HTTP server on every back- end server for each front-end server Authentication and connection timeout settings vary between server roles

24 AUTHENTICATION Anonymous Basic Integrated Windows Simple Authentication and Security Layer (SASL) Digest.NET Password

25 ENCRYPTION Requires a certificate Resource intensive (especially processor) SSL and TLS encryption require basic authentication Encryption jumbles message so that third parties cannot read it Authentication ensures users are who they claim to be Digital signature proves that a specific person is the message sender

26 ENCRYPTION METHODS Encrypts all traffic between source and destination Invisible to user Not specific to Encrypts all traffic between source and destination Invisible to user Not specific to SSL Typically implemented on IMAP4, POP3, and HTTP virtual servers on front-end Exchange servers Implemented on SMTP virtual servers Both sender and receiver need to implement TLS Typically used for communication between partner organizations Not used for general Internet Implemented on SMTP virtual servers Both sender and receiver need to implement TLS Typically used for communication between partner organizations Not used for general Internet TLS IPSec

27 AUTHENTICATION OPTIONS: ADDITIONAL HTTP VIRTUAL SERVER ON A BACK-END SERVER

28 AUTHENTICATION OPTIONS: ADDITIONAL HTTP VIRTUAL SERVER ON A FRONT-END SERVER

29 AUTHENTICATION OPTIONS: POP3 AND IMAP4 VIRTUAL SERVERS ON A BACK-END SERVER

30 AUTHENTICATION OPTIONS: POP3 AND IMAP4 VIRTUAL SERVERS ON A FRONT- END SERVER

31 AUTHENTICATION OPTIONS: NNTP VIRTUAL SERVER

32 AUTHENTICATION OPTIONS: SMTP VIRTUAL SERVER

33 AUTHENTICATION OPTIONS: EXCHANGE VIRTUAL SERVER

34 DEMONSTRATION: DISCONNECTING USERS

35 DIAGNOSTIC LOGGING Records authentication, connection, and client action events Set the level of logging on the host server Set the logging level and category for a specific service Events logged in server application log

36 SETTING A DIAGNOSTIC LEVEL

37 VIEWING A DIAGNOSTIC LOGGING ENTRY

38 SUMMARY Exchange virtual server in a clustered environment Protocol virtual servers: SMTP, NNTP, POP3, IMAP4, HTTP Front-end and back-end configuration Authentication Encryption