Chapter 9

11

VIRTUAL SERVERS Chapter 7

Chapter 7: Virtual Servers 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

HTTP Yes

No

Default Virtual ServerDefault Virtual Server EnabledEnabled

SMTP

NNTP

POP3

IMAP4

Yes

No

No


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


VIRTUAL SERVER REQUIREMENTS

Static IP address

Network name

One or more dedicated physical disks

Exchange 2003 Server System Attendant


DEFAULT VIRTUAL SERVER CONFIGURATIONS

(All Unassigned)

Virtual Virtual ServerServer TCP PortTCP Port

IP IP AddressAddress SSL PortSSL Port

POP3 110

119

IMAP4

NNTP

HTTP

SMTP

143

80

25

(All Unassigned)

(All Unassigned)

(All Unassigned)

(All Unassigned)

995

563

993

443

N/A


POP3 VIRTUAL SERVERS

Retrieve a specific user’s mail from the server Access only server inboxes Do not send e-mail Can configure the following:

Access to specific computers, groups of computers, or domains

Authentication (back-end only) Encryption Number of inbound connections Messaging format


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


NNTP VIRTUAL SERVERS

Access newsgroups

Enable Microsoft Outlook users to participate in online discussions

Let you assign a moderator to a newsgroup


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 connectionAuthenticate users


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


HTTP AND WEBDAV

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

E-mail

Applications


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


DEMONSTRATION: CONFIGURING THE EXCHANGE VIRTUAL SERVER


DEMONSTRATION: CREATING AN ADDITIONAL HTTP VIRTUAL SERVER


DEMONSTRATION: CONFIGURING AN ADDITIONAL HTTP VIRTUAL SERVER


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


DEMONSTRATION: CONFIGURING THE ADDITIONAL POP3 VIRTUAL SERVER


DEMONSTRATION: CONFIGURING THE DEFAULT IMAP4 VIRTUAL SERVER


DEMONSTRATION: CONFIGURING THE DEFAULT SMTP VIRTUAL SERVER


DEMONSTRATION: CREATING AN ADDITIONAL NNTP VIRTUAL SERVER


DEMONSTRATION: CONFIGURING THE ADDITIONAL NNTP VIRTUAL SERVER


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


AUTHENTICATION

Anonymous

Basic

Integrated Windows

Simple Authentication and Security Layer (SASL)

Digest

.NET Password


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


ENCRYPTION METHODS

Encrypts all traffic between source and destination

Invisible to user

Not specific to e-mail

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 e-mail

TLS

IPSec


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


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


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


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


AUTHENTICATION OPTIONS: NNTP VIRTUAL SERVER


AUTHENTICATION OPTIONS: SMTP VIRTUAL SERVER


AUTHENTICATION OPTIONS: EXCHANGE VIRTUAL SERVER


DEMONSTRATION: DISCONNECTING USERS


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


SETTING A DIAGNOSTIC LEVEL


VIEWING A DIAGNOSTIC LOGGING ENTRY


SUMMARY

Exchange virtual server in a clustered environment

Protocol virtual servers: SMTP, NNTP, POP3, IMAP4, HTTP

Front-end and back-end configuration

Authentication

Encryption

Date post:	06-Dec-2014
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Chapter 9

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