F-SECURE ANTI-VIRUS - FOR MICROSOFT EXCHANGE Administrator's Manual

Category
Software
Type
Administrator's Manual

This manual is also suitable for

F-Secure Anti-Virus for
Microsoft Exchange
Administrators Guide
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3
Contents
About This Guide 9
How This Guide Is Organized ............................................................................................ 10
Conventions Used in F-Secure Guides.............................................................................. 12
Symbols .................................................................................................................... 12
Chapter 1 Introduction 14
1.1 Overview....................................................................................................................15
1.2 How F-Secure Anti-Virus for Microsoft Exchange Works...........................................16
1.3 Key Features..............................................................................................................19
1.4 F-Secure Anti-Virus Mail Server and Gateway Products...........................................21
Chapter 2 Deployment 23
2.1 Installation Modes......................................................................................................24
2.2 Network Requirements...............................................................................................24
2.3 Deployment Scenarios...............................................................................................25
2.3.1 Minimum Installation.......................................................................................25
2.3.2 Medium to Large Installation ..........................................................................27
2.3.3 Performance-Critical Installation.....................................................................28
2.3.4 Microsoft Exchange Cluster Environment ......................................................30
Chapter 3 Installation 32
3.1 System Requirements................................................................................................33
3.1.1 Minimum System Requirements.....................................................................33
3.1.2 Which SQL Server to Use for the Quarantine Database?..............................35
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3.1.3 Web Browser Software Requirements ...........................................................36
3.2 Improving Reliability and Performance ......................................................................37
3.3 Centrally Administered or Stand-alone Installation? ..................................................38
3.4 Installation Overview..................................................................................................38
3.5 Installing F-Secure Anti-Virus for Microsoft Exchange...............................................40
3.6 After the Installation ...................................................................................................59
3.6.1 Importing Product MIB files to F-Secure Policy Manager Console.................59
3.6.2 Configuring the Product..................................................................................60
3.7 Upgrading the Previous Version ................................................................................60
3.8 Upgrading the Evaluation Version..............................................................................63
3.9 Uninstalling F-Secure Anti-Virus for Microsoft Exchange ..........................................64
Chapter 4 Using F-Secure Anti-Virus for Microsoft Exchange 65
4.1 Overview....................................................................................................................66
4.2 Administering F-Secure Anti-Virus for Microsoft Exchange .......................................66
4.3 Using the Web Console .............................................................................................67
4.3.1 Logging in for the First Time...........................................................................67
4.4 Checking the Product Status......................................................................................70
4.5 Configuring the Web Console....................................................................................73
4.6 Using F-Secure Policy Manager Console ..................................................................74
4.7 Modifying Settings and Viewing Statistics..................................................................75
4.7.1 Centrally Administered Mode .........................................................................75
4.7.2 Stand-alone Mode..........................................................................................76
4.8 Manually Processing Mailboxes and Public Folders..................................................77
4.8.1 Centrally Administered Mode .........................................................................77
4.8.2 Stand-alone Mode..........................................................................................86
4.8.3 Creating Scanning Operations .......................................................................87
4.9 Configuring Alert Forwarding ...................................................................................119
4.9.1 Centrally Administered Mode .......................................................................119
4.9.2 Stand-Alone Mode........................................................................................122
4.10 Viewing Alerts ..........................................................................................................123
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Chapter 5 Centrally Managed Administration 125
5.1 Overview..................................................................................................................126
5.2 F-Secure Anti-Virus for Microsoft Exchange Settings..............................................126
5.2.1 Real-Time Processing..................................................................................128
5.2.2 Manual Processing.......................................................................................159
5.2.3 Scheduled Processing..................................................................................174
5.2.4 Content Scanner Servers.............................................................................175
5.2.5 Quarantine....................................................................................................178
5.2.6 Reporting......................................................................................................182
5.2.7 Advanced......................................................................................................182
5.3 F-Secure Anti-Virus for Microsoft Exchange Statistics.............................................184
5.3.1 Common.......................................................................................................185
5.3.2 Real-Time Processing..................................................................................186
5.3.3 Manual Processing.......................................................................................189
5.3.4 Quarantine....................................................................................................192
5.4 F-Secure Content Scanner Server Settings.............................................................193
5.4.1 Interface........................................................................................................195
5.4.2 Virus Scanning .............................................................................................196
5.4.3 Virus Statistics..............................................................................................199
5.4.4 Database Updates........................................................................................201
5.4.5 Spam Filtering ..............................................................................................202
5.4.6 Threat Detection Engine...............................................................................204
5.4.7 Proxy Configuration......................................................................................205
5.4.8 Advanced......................................................................................................206
5.5 F-Secure Content Scanner Server Statistics ...........................................................208
5.5.1 Server...........................................................................................................208
5.5.2 Scan Engines ...............................................................................................209
5.5.3 Common.......................................................................................................210
5.5.4 Spam Control................................................................................................210
5.5.5 Virus Statistics..............................................................................................211
5.6 F-Secure Automatic Update Agent Settings ............................................................212
5.7 F-Secure Management Agent Settings....................................................................214
Chapter 6 Administration with Web Console 216
6.1 Overview..................................................................................................................217
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6.2 F-Secure Anti-Virus for Microsoft Exchange Settings..............................................218
6.2.1 Summary......................................................................................................218
6.2.2 Virus Scanning .............................................................................................220
6.2.3 Stripping Attachments ..................................................................................236
6.2.4 Content Filtering...........................................................................................246
6.2.5 Manual Scanning..........................................................................................253
6.2.6 Quarantine....................................................................................................257
6.2.7 Advanced......................................................................................................267
6.2.8 Internal Domains ..........................................................................................273
6.3 F-Secure Content Scanner Server Settings.............................................................275
6.3.1 Summary......................................................................................................275
6.3.2 Database Updates........................................................................................282
6.3.3 Scan Engines ...............................................................................................284
6.3.4 Proxy Configuration......................................................................................289
6.3.5 Archive Scanning..........................................................................................292
6.3.6 Advanced......................................................................................................295
6.3.7 Interface........................................................................................................297
6.4 F-Secure Automatic Update Agent Settings ............................................................298
6.4.1 Summary......................................................................................................299
6.4.2 Automatic Updates.......................................................................................301
6.4.3 PM Proxies...................................................................................................303
6.5 F-Secure Management Agent Settings....................................................................304
Chapter 7 Quarantine Management 307
7.1 Introduction ..............................................................................................................308
7.2 Configuring Quarantine Options...............................................................................309
7.3 Searching the Quarantined Content.........................................................................310
7.4 Query Results Page.................................................................................................314
7.5 Viewing Details of a Quarantined Message.............................................................316
7.6 Reprocessing the Quarantined Content...................................................................318
7.7 Releasing the Quarantined Content.........................................................................319
7.8 Removing the Quarantined Content.........................................................................321
7.9 Deleting Old Quarantined Content Automatically.....................................................321
7.10 Quarantine Logging..................................................................................................322
7.11 Quarantine Statistics................................................................................................323
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7.12 Moving the Quarantine Storage ...............................................................................324
Chapter 8 Administering F-Secure Spam Control 326
8.1 Overview..................................................................................................................327
8.2 Spam Control Settings in Centrally Managed Environments ...................................328
8.3 Spam Control Settings in Web Console...................................................................331
8.4 Realtime Blackhole List Configuration .....................................................................336
8.4.1 Enabling Realtime Blackhole Lists ...............................................................336
8.4.2 Optimizing F-Secure Spam Control Performance........................................338
Chapter 9 Updating Virus and Spam Definition Databases 340
9.1 Overview..................................................................................................................341
9.2 Automatic Updates with F-Secure Automatic Update Agent....................................341
9.3 Configuring Automatic Updates ...............................................................................342
9.4 Manual Updates.......................................................................................................342
9.4.1 Using FSUPDATE........................................................................................342
9.4.2 Updating the Virus Definition Database Remotely Using LATEST.ZIP........343
AppendixA Deploying the Product on a Cluster 344
A.1 System and Network Recommendations................................................................ 345
A.2 Installation Overview................................................................................................347
A.3 Creating Quarantine Storage...................................................................................348
A.3.1 Quarantine Storage in Active-Passive Cluster .............................................348
A.3.2 Quarantine Storage in Active-Active Cluster................................................353
A.4 Installing the Product................................................................................................356
A.4.1 Installing on Active-Passive Cluster .............................................................356
A.4.2 Installing on Active-Active Cluster................................................................358
A.5 Administering the Cluster Installation with F-Secure Policy Manager......................360
A.6 Using the Quarantine in the Cluster Installation.......................................................363
A.7 Troubleshooting .......................................................................................................363
AppendixB Variables in Warning Messages 364
List of Variables................................................................................................................ 365
Outbreak Management Alert Variables............................................................................ 367
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AppendixC Services and Processes 368
Chapter D Troubleshooting 374
D.1 Overview..................................................................................................................375
D.2 Starting and Stopping...............................................................................................375
D.3 Viewing the Log File.................................................................................................375
D.4 Common Problems and Solutions............................................................................376
D.4.1 Installing Service Packs................................................................................379
D.4.2 Securing the Quarantine...............................................................................379
D.4.3 Administration Issues ...................................................................................380
D.5 Frequently Asked Questions....................................................................................381
D.6 F-Secure Automatic Update Agent Troubleshooting................................................386
Technical Support 392
F-Secure Online Support Resources ............................................................................... 393
Web Club .........................................................................................................................395
Virus Descriptions on the Web .........................................................................................395
9
ABOUT THIS GUIDE
How This Guide Is Organized.................................................... 10
Conventions Used in F-Secure Guides..................................... 13
10
How This Guide Is Organized
F-Secure Anti-Virus for Microsoft Exchange Administrator's Guide is
divided into the following chapters:
Chapter 1. Introduction. General information about F-Secure Anti-Virus
for Microsoft Exchange and other F-Secure Anti-Virus Mail Server and
Gateway products.
Chapter 2. Deployment. Instructions and examples how to set up your
network environment before you can install F-Secure Anti-Virus for
Microsoft Exchange.
Chapter 3. Installation. Instructions how to install and set up F-Secure
Anti-Virus for Microsoft Exchange.
Chapter 4. Using F-Secure Anti-Virus for Microsoft Exchange.
Instructions how to use and administer F-Secure Anti-Virus for Microsoft
Exchange.
Chapter 9. Updating Virus and Spam Definition Databases. Instructions
how to update your virus definition database.
Chapter 5. Centrally Managed Administration. Instructions how to
remotely administer F-Secure Anti-Virus for Microsoft Exchange and
F-Secure Content Scanner Server when they have been installed in
centralized administration mode.
Chapter 6. Administration with Web Console. Instructions how to
administer F-Secure Anti-Virus for Microsoft Exchange with the Web
Console.
Chapter 8. Administering F-Secure Spam Control. General information
about and instructions on how to configure F-Secure Spam Control.
Appendix A. Deploying the Product on a Cluster. Describes how the
product can be deployed and used on the cluster environment.
Appendix B. Variables in Warning Messages. Lists variables that can
be included in virus warning messages.
Appendix C. Services and Processes. Describes services, devices and
processes of F-Secure Anti-Virus for Microsoft Exchange.
About This Guide 11
Chapter D. Troubleshooting. Solutions to some common problems.
Technical Support. Contains the contact information for assistance.
About F-Secure Corporation. Describes the company background and
products.
See the F-Secure Policy Manager Administrator's Guide for detailed
information about installing and using the F-Secure Policy Manager
components:
F-Secure Policy Manager Console, the tool for remote
administration of F-Secure Anti-Virus for Microsoft Exchange.
F-Secure Policy Manager Server, which enables communication
between F-Secure Policy Manager Console and the managed
systems.
12
Conventions Used in F-Secure Guides
This section describes the symbols, fonts, and terminology used in this
manual.
Symbols
An arrow indicates a one-step procedure.
Fonts
Arial bold (blue) is used to refer to menu names and commands, to
buttons and other items in a dialog box.
Arial Italics (blue) is used to refer to other chapters in the manual, book
titles, and titles of other manuals.
Arial Italics (black) is used for file and folder names, for figure and table
captions, and for directory tree names.
Courier New is used for messages on your computer screen.
WARNING: The warning symbol indicates a situation with a
risk of irreversible destruction to data.
IMPORTANT: An exclamation mark provides important information
that you need to consider.
REFERENCE - A book refers you to related information on the
topic available in another document.
l
NOTE - A note provides additional information that you should
consider.
TIP - A tip provides information that can help you perform a task
more quickly or easily.
13
Courier New bold is used for information that you must type.
SMALL CAPS (BLACK) is used for a key or key combination on your
keyboard.
Arial underlined (blue)
is used for user interface links.
Arial italics is used for window and dialog box names.
PDF Document
This manual is provided in PDF (Portable Document Format). The PDF
document can be used for online viewing and printing using Adobe®
Acrobat® Reader. When printing the manual, please print the entire
manual, including the copyright and disclaimer statements.
For More Information
Visit F-Secure at http://www.f-secure.com for documentation, training
courses, downloads, and service and support contacts.
In our constant attempts to improve our documentation, we would
welcome your feedback. If you have any questions, comments, or
suggestions about this or any other F-Secure document, please contact
us at documentation@f-secure.com
.
14
1
INTRODUCTION
Overview..................................................................................... 15
How F-Secure Anti-Virus for Microsoft Exchange Works........... 16
Key Features.............................................................................. 19
F-Secure Anti-Virus Mail Server and Gateway Products............ 21
CHAPTER 1 15
Introduction
1.1 Overview
Malicious code, such as computer viruses, is one of the main threats for
companies today. In the past, malicious code spread mainly via disks and
the most common viruses were the ones that infected disk boot sectors.
When users began to use office applications with macro capabilities -
such as Microsoft Office - to write documents and distribute them via mail
and groupware servers, macro viruses started spreading rapidly.
After the millennium, the most common spreading mechanism has been
the e-mail. Today about 90% of viruses arrive via e-mail. E-mails provide
a very fast and efficient way for viruses to spread themselves without any
user intervention and that is why e-mail worm outbreaks, like Sober,
Netsky and Bagle, have caused a lot of damage around the world.
F-Secure Anti-Virus Mail Server and Gateway products are designed to
protect your company's mail and groupware servers and to shield the
company network from any malicious code that travels in HTTP or SMTP
traffic. In addition, they protect your company network against spam. The
protection can be implemented on the gateway level to screen all
incoming and outgoing e-mail (SMTP), web surfing (HTTP and
FTP-over-HTTP) and file transfer (FTP) traffic. Furthermore, it can be
implemented on the mail server level so that it does not only protect
inbound and outbound traffic but also internal mail traffic and public
sources, such as Public Folders on Microsoft Exchange servers.
Providing the protection already on the gateway level has plenty of
advantages. The protection is easy and fast to set up and install,
compared to rolling out antivirus protection on hundreds or thousands of
workstations. The protection is also invisible to the end users which
ensures that the system cannot be by-passed and makes it easy to
maintain. Of course, protecting the gateway level alone is not enough to
provide a complete antivirus solution; file server and workstation level
protection is needed, also.
Why clean 1000 workstations when you can clean one attachment at the
gateway level?
16
1.2 How F-Secure Anti-Virus for Microsoft Exchange
Works
F-Secure Anti-Virus for Microsoft Exchange is designed to detect and
disinfect viruses and other malicious code from e-mail transmissions
through Microsoft Exchange 2000/2003 Server. Scanning is done in real
time as the mail passes through Microsoft Exchange Server. On-demand
scanning of user mailboxes and Public Folders is also available.
Scanning
Attachments and
Message Bodies
F-Secure Anti-Virus for Microsoft Exchange scans attachments and
message bodies for malicious code. It can also be instructed to remove
particular attachments according to the file name or the file extension. In
addition, it can filter out messages containing keywords that have been
defined as disallowed.
If the intercepted mail contains malicious code, F-Secure Anti-Virus for
Microsoft Exchange can be configured to disinfect or drop the content.
Any malicious code found during the scan process can be placed in the
Quarantine, where it can be further examined. Stripped attachments can
also be placed in the Quarantine for further examination.
Flexible and Scalable
Anti-Virus Protection
F-Secure Anti-Virus for Microsoft Exchange is installed on Microsoft
Exchange 2000/2003 Server and it intercepts mail traveling through
mailboxes and Public folders. Intercepted attachments and documents
are sent to F-Secure Content Scanner Server, which returns disinfected
files back to F-Secure Anti-Virus for Microsoft Exchange.
The two-component product architecture ensures that the anti-virus
protection does not increase the load on the protected system and that
the infected data is never stored on the production network. It also
enables you to implement a server pool, so you can share the traffic load
between multiple F-Secure Content Scanner Servers and have backup
servers if the traffic to primary servers stops for some reason.
CHAPTER 1 17
Introduction
Alerting F-Secure Anti-Virus for Microsoft Exchange has extensive alerting
functions, which means that the system administrator can specify a
recipient inside the company network to be notified about the infection
found in the data content. Of course, the network administrator can be
notified about the infection also.
Powerful and Always
Up-to-date
F-Secure Anti-Virus for Microsoft Exchange uses the award-winning
F-Secure Anti-Virus scanner to ensure the highest possible detection rate
and disinfection capability. The daily F-Secure Anti-Virus signature
database updates provide F-Secure Anti-Virus for Microsoft Exchange an
always up-to-date protection capability.
F-Secure Anti-Virus scanner consistently ranks at the top when compared
to competing products. Our team of dedicated virus researchers is on call
24-hours a day responding to new and emerging threats. In fact,
F-Secure is one of the only companies to release tested virus definition
updates on a daily basis, to make sure our customers are receiving the
highest quality service and protection.
Virus and Spam
Outbreak Detection
Massive spam and virus outbreaks consist of millions of messages which
share at least one identifiable pattern that can be used to distinguish the
outbreak. Any message that contains one or more of these patterns can
be assumed to be a part of the same spam or virus outbreak.
F-Secure Anti-Virus for Microsoft Exchange can identify these patterns
from the message envelope, headers and body, in any language,
message format and encoding type. It can detect spam messages and
new viruses during the first minutes of the outbreak.
Stand-alone and
Centralized
Administration Modes
F-Secure Anti-Virus for Microsoft Exchange can be installed either in
stand-alone or centrally administered mode. Depending on how it has
been installed, F-Secure Anti-Virus for Microsoft Exchange is managed
either with the Web Console or F-Secure Policy Manager.
Scalability and
Reliability
F-Secure Policy Manager provides a scalable way to manage the security
of multiple applications on multiple operating systems, from one central
location. F-Secure Policy Manager is comprised of two components,
F-Secure Policy Manager Console and F-Secure Policy Manager Server,
18
which are used to administer applications. They are seamlessly
integrated with the F-Secure Management Agents that handle all
management functions on local hosts.
Easy to Administer If F-Secure Anti-Virus for Microsoft Exchange is installed in stand-alone
mode it can be managed with the web-based user interface. With Web
Console, you can configure F-Secure Anti-Virus for Microsoft Exchange
settings, set up scheduled scans or run manual processes any time you
want.
If F-Secure Anti-Virus for Microsoft Exchange has been installed in
centrally administered configuration, it is managed with F-Secure Policy
Manager. With its graphical user interface, F-Secure Policy Manager
Console provides a centralized view of the domains and hosts in your
network and lets you configure the security policies for all F-Secure
components. F-Secure Policy Manager receives status information from
F-Secure Anti-Virus for Microsoft Exchange.
F-Secure Policy Manager Server is the server side component that
handles communication between F-Secure Anti-Virus for Microsoft
Exchange and F-Secure Policy Manager Console. It exchanges security
policies, software updates, status information, statistics, alerts, and other
information between F-Secure Policy Manager Console and all managed
systems.
Figure 1-1 (1) E-mail arrives from the Internet to F-Secure Anti-Virus for Microsoft
Exchange, which (2) filters malicious content from mails and attachments, and (3)
delivers cleaned files forward.
CHAPTER 1 19
Introduction
1.3 Key Features
F-Secure Anti-Virus for Microsoft Exchange provides the following
features and capabilities.
Superior Protection Superior detection rate with multiple scanning engines.
Automatic malicious code detection and disinfection.
Heuristic scanning detects also unknown Windows and macro
viruses.
Recursive scanning of ARJ, BZ2, CAB, GZ, JAR, LZH, MSI,
RAR, TAR, TGZ, Z and ZIP archive files.
Automatic daily virus definition database updates.
Suspicious and unsafe attachments can be stripped away from
e-mails.
Password protected archives can be treated as unsafe.
Intelligent file type recognition.
Message filtering based on keywords in message subjects and
text.
Utilizes the low-level Anti-Virus API (AV API 2.0) for Microsoft
Exchange 2000 Server, and AV AP 2.5 for Microsoft Exchange
2003 Server.
Virus Outbreak
Detection
The virus outbreak detection is an additional active layer of
protection that automatically detects virus outbreaks and
quarantines suspicious messages.
Virus outbreaks are transparently detected and infected
messages are quarantined before the outbreak becomes
widespread.
The product can notify the administrator about virus outbreaks.
Quarantined unsafe messages can be reprocessed
automatically.
20
Transparency and
Scalability
Viruses are intercepted before they can enter the network and
spread out on workstations and servers.
Real-time scanning of internal, inbound and outbound mail
messages and Public Folder notes.
Automatic protection of new mailboxes and Public Folders.
Total transparency to end-users. Users cannot bypass the
system, which means that messages and documents cannot be
exchanged without scanning.
Support for Windows 2000 Advanced Server or Windows Server
2003 clusters. Both Active-Passive and Active-Active clusters are
supported.
Management Controlling and monitoring the behavior of the products remotely.
Starting predefined operations remotely.
Monitoring statistics provided by the products remotely with
F-Secure Policy Manager or F-Secure Anti-Virus for Microsoft
Exchange Web Console.
Possibility to configure and manage stand-alone installations with
the convenient F-Secure Anti-Virus for Microsoft Exchange Web
Console.
Contains new quarantine management features: you can manage
and search quarantined content with the F-Secure Anti-Virus for
Microsoft Exchange Web Console.
Protection against
Spam
Possible spam messages are transparently detected before they
become widespread.
Efficient spam detection based on different analyses on the
e-mail content.
Multiple filtering mechanisms guarantee the high accuracy of
spam detection.
Spam detection works in every language and message format.
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F-SECURE ANTI-VIRUS - FOR MICROSOFT EXCHANGE Administrator's Manual

Category
Software
Type
Administrator's Manual
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