KASPERSKY LABS. Kaspersky Anti-Virus 5.1 for Microsoft ISA Server. Administrator s guide

Transcription

1 KASPERSKY LABS Kaspersky Anti-Virus 5.1 for Microsoft ISA Server Administrator s guide

2 KASPERSKY ANTI-VIRUS 5.1 FOR MS ISA SERVER Administrator s Guide Kaspersky Labs Ltd. Edition date: July 2004

3 Contents CHAPTER 1. KASPERSKY ANTI-VIRUS FOR MS ISA SERVER Hardware and software requirements Distribution kit Help Desk for registered users Conventions... 7 CHAPTER 2. TYPICAL DEPLOYMENT SCENARIOS... 8 CHAPTER 3. HOW TO INSTALL THE APPLICATION Configuring ISA Server before installing the application Installing Kaspersky Anti-Virus First installation Reinstalling Troubleshooting installation problems CHAPTER 4. USING KASPERSKY ANTI-VIRUS FOR ISA SERVER Default values of scan settings Managing scans Configuring general settings of anti-virus scanning General settings Settings for HTTP scanning Settings for FTP scanning Managing groups Specifying policies for anti-virus scanning Managing a list of trusted servers Creating a list of objects excluded from scans Updating the anti-virus database Scheduled updating of the anti-virus database On-demand updating Managing notifications Testing Kaspersky Anti-Virus operation Application statistics and diagnostics... 42

4 3 Kaspersky Anti-Virus for MS ISA Server Recording and viewing statistics Notifying the administrator using ISA Server Alerts Configuring diagnostics options for the application Managing license keys Renewing your license Removing a license key CHAPTER 5. TROUBLESHOOTING APPENDIX A. GLOSSARY APPENDIX B. KASPERSKY LABS LTD.... ERROR! BOOKMARK NOT DEFINED. B.1. Other Kaspersky Labs products...error! Bookmark not defined. B.2. Contact Information...Error! Bookmark not defined. APPENDIX C. LICENSE AGREEMENT... 61

5 Chapter 1. Kaspersky Anti- Virus for MS ISA Server Kaspersky Anti-Virus for Microsoft ISA Server (hereafter, also Kaspersky Anti-Virus for ISA Servers) is a system of anti-virus control for files transferred using the HTTP and FTP protocols via the Microsoft Internet Security and Acceleration Server. It ensures reliable protection of corporate networks from penetration by malicious software. Kaspersky Anti-Virus for MS ISA Server acts as a filter that intercepts packets transferred via the HTTP and FTP protocols, isolates controlled objects from this data, analyzes them for the presence of viruses, and prevents infected files and Web documents from penetrating into a corporate network. The program includes data stream filters and the anti-virus kernel. The filters are integrated into MS ISA Server as plug-ins, and the anti-virus kernel is installed into the system as a service. The anti-virus protection is managed through a special interface built into the ISA administration snap-in for Microsoft Management Console (MMC) as an extension. The application performs the following functions: Anti-virus protection and processing of data streams received from the Internet. Generation of data streams from disinfected files and the delivery of these streams to the client upon request. Scheduled and manual updating of the anti-virus database via the Internet, a local folder, or a shared folder. Logging of statistics about program performance and displaying the results using standard Windows tools. Management of license keys. In addition, Kaspersky Anti-Virus for MS ISA Server allows the user to: Set parameters for anti-virus protection and for notifications about dangerous events. Create groups of users in accordance with the adopted network policy. For example, you can use the existing administration division to define

6 5 Kaspersky Anti-Virus for MS ISA Server anti-virus policy settings for each of the groups created. This can significantly speed up the scanning process. Create a list of trusted servers for one or several groups of users; the traffic from these servers will be excluded from scanning for viruses. Create a list of types of object excluded from anti-virus protection. Kaspersky Anti-Virus supports the following data transfer protocols: HTTP 1.0 and 1.1 (RFC 2616); FTP (RFC 959, 2389, Extensions to FTP); FTP over HTTP Hardware and software requirements Kaspersky Anti-Virus for MS ISA Server operates in integration with Microsoft Internet Security and Acceleration Server 2000 with Service Pack 1 or higher installed under the following platforms: Microsoft Windows 2003 Server. Microsoft Windows 2000 Server (Service Pack 3 or higher). Microsoft Windows 2000 Advanced Server (Service Pack 3 or higher). This version of the program cannot be installed on MS ISA Server computers operating as array members. To use Kaspersky Anti-Virus for MS ISA Server, your computer must meet the following minimum requirements: Pentium II processor of 300 MHz or higher. At least 256 Mb of free RAM. At least 20 Mb of free hard disk space for installation of the program. At least 200 Mb of free hard disk space for temporary storage of data copied from the Internet before scanning for viruses.

7 Kaspersky Anti-Virus for MS ISA Server Distribution kit You can purchase Kaspersky Anti-Virus for MS ISA Server either from our distributors (retail box) or online at one of our Internet shops (for example, select the E store link). The retail box includes: a sealed envelope with an installation CD containing files for the software product; administrator's guide; a license key written on the floppy disk; license agreement. Before you unseal the envelope containing the CD, be sure to thoroughly review the license agreement. If you buy Kaspersky Anti-Virus for MS ISA Server online, you download the installation file of the product from the Kaspersky Labs website. This installation file includes this Administrator s Guide and the license key. The license key can also be sent to you by after receiving your payment. The License Agreement is a legal agreement between you and the manufacturer (Kaspersky Labs Ltd.) describing the terms on which you may employ the antivirus product which you have purchased. Make sure you read the License Agreement! If you do not agree to the terms of this LA, you can return the unused product to your Kaspersky Anti-Virus dealer for a full refund, making sure the envelope containing the CD is sealed. If you unseal the envelope or install the program, you are considered to have agreed to all the terms of the LA Help Desk for registered users Kaspersky Labs offers a large service package enabling its registered customers to enjoy all the available features of Kaspersky Anti-Virus. If you register and purchase a subscription you will be provided with the following services for the period of your subscription:

8 7 Kaspersky Anti-Virus for MS ISA Server new versions of this anti-virus software product provided free of charge; phone or advice on matters related to the installation, configuration, and operation of this anti-virus product; information about new Kaspersky Labs products and about new computer viruses (for those who subscribe to the Kaspersky Labs newsletter). Kaspersky Labs does not provide information related to the operation and use of your operating system or various other technologies Conventions In this book we use various conventions to emphasize different meaningful parts of the documentation. The Table below lists the conventions used in this User Guide. Convention Meaning Bold font Menu titles, commands, window titles, dialog elements, etc. Note. Additional information, notes Attention! Critical information To do this, Actions that must be taken 1. Step Text of information messages and the command line Text of configuration files, information messages, and the command line.

9 Chapter 2. Typical Deployment scenarios A typical scenario for deploying ISA Server and most of its services is as follows: the administrator installs the application on the ISA Server computer, and the ISA administration tool on a remote computer (as a rule, an administrator s workstation). In this deployment scenario, the Kaspersky Anti-Virus application must be installed on the ISA Server computer, and the Kaspersky Anti-Virus administration console, on the administrator s workstation. The computer that runs the Kaspersky Anti-Virus for ISA Server administration console must only have the ISA Server administration tools installed. You can install separate components of Kaspersky Anti-Virus manually installing the application (see Chapter 3 on page 11). by During the installation procedure, the program will automatically detect the ISA Server mode. Below, we consider possible ISA Server modes and any special features of Kaspersky Anti-Virus operation for each of these modes. The documentation for ISA Server describes three possible modes: Firewall. Proxy (Cache). Integrated. In Firewall mode, ISA Server protects internal network communications from various types of Internet-borne threats by using various tools, such as IP packet filters, Web filters, and application filters. In this mode, caching of transmitted information is disabled. In Proxy (Cache) mode, ISA Server acts as a cache server that routes requests and plans data loading for efficient processing of subsequent clients requests. In this mode, ISA Server does not function as a firewall. In Integrated mode, all the features of the firewall and cache server are available. In addition, in this mode, you can set ISA Server to operate separately in the Proxy or Firewall modes. During the installation of Kaspersky Anti-Virus, the mode in which ISA Server operates is determined automatically. Depending on the mode, various sets of data stream filters are installed.

10 9 Kaspersky Anti-Virus for MS ISA Server The following Kaspersky Anti-Virus filters can optionally be added to the system: Kaspersky Anti-Virus FTP Application Filter. Kaspersky Anti-Virus Web Filter. Kaspersky Anti-Virus HTTP Application Filter. Table 1 shows filter options for the three ISA Server modes. Table 1 Filters Proxy Firewall Integrated Kaspersky Anti-Virus FTP Application Filter No Yes Yes Kaspersky Anti-Virus Web Filter Yes Yes 1 Yes Kaspersky Anti-Virus HTTP Application Filter No Yes No After Kaspersky Anti-Virus is installed, you will be able to manage the above filters using the ISA Server Administration interface. When the ISA Server is running in the Firewall mode Kaspersky Anti-Virus Web Filter is installed in disabled state, since it is presupposed that all the clients use the ISA Server as a firewall without accessing the proxy server directly. If the clients do access the proxy server directly (e.g. their browsers are set to work via the proxy), please enable Kaspersky Anti-Virus Web Filter after the application is installed to make sure the traffic passing via the proxy server is scanned for viruses. If you reinstall ISA Server to change the installed mode, you must also reinstall Kaspersky Anti-Virus and select only those filters that are compatible with the selected mode. Fig. 1 shows a scheme of processing the initial data streams that are common for all possible Kaspersky Anti-Virus deployment scenarios. 1 The filter is disabled by default

11 Typical Deployment scenarios 10 Figure 1. Processing of data streams by Kaspersky Anti-Virus for MS ISA Server

12 Chapter 3. How to install the application To correctly install the Kaspersky Anti-Virus application, you should first properly configure HTTP Redirector Filter and FTP Access Filter of the ISA Server and then install the application on your computer Configuring ISA Server before installing the application The MS ISA Server console provides a number of standard filters for controlling data packets received from the Internet. The HTTP protocols are controlled by the HTTP Redirector Filter. The FTP protocols are controlled by the FTP Access Filter (not used in Proxy mode). Kaspersky Anti-Virus for MS ISA Server uses default settings of these filters to receive the initial data streams and subsequently process them. Before installing Kaspersky Anti-Virus for ISA Server, make sure that the standard HTTP Redirector Filter and FTP Access Filter are enabled and are forwarding data streams to pass through the anti-virus filter. Otherwise, disabling these filters can lead to disabling the anti-virus protection of your server! Data stream filters are controlled from the standard console tree of ISA Management. To configure HTTP Redirector Filter and FTP Access Filter: In the console tree of the ISA Management main window, select the Extensions node and click the Application Filters folder. If one of these filters is disabled, you will see the icon in the list of filters. To enable a filter: 1. Select the required filter in the list and open the Properties dialog box.

13 How to install the application For FTP Access Filter, click Enable this filter in the FTP Access Filter Properties dialog box. 3. For HTTP Redirector Filter, click Enable this filter on the General tab of the HTTP Redirector Filter Properties dialog box. Then, on the Options tab, select Send to requested Web server, if MS ISA Server is operating in Firewall mode. This will allow the data streams flowing through the HTTP protocol to enter the corresponding Kaspersky Anti- Virus filters. If you have selected Send to local Web Proxy server when the ISA Server is running in the Firewall mode and have enabled Kaspersky Anti-Virus Web Filter, it is recommended to disable Kaspersky Anti-Virus HTTP Application Filter in order to avoid duplication checking of the traffic: when passing through the HTTP Redirector Filter and the local proxy server. Sometimes, third-party filters are used in conjunction with the standard MS ISA Server filters. However, these additional filters can affect the performance of the anti-virus application if their settings prevent the initial data from entering the Kaspersky Anti-Virus filters. Moreover, in some cases, Kaspersky Anti-Virus for ISA Server might be completely disabled because of these filters Installing Kaspersky Anti-Virus The installation procedure for Kaspersky Anti-Virus for ISA Server is standard for most Windows applications. You can select complete installation or custom installation and restore an Anti-Virus configuration in the case of an incorrect installation First installation Step 1. Welcome and License Agreement dialog boxes During the initial stages, the Kaspersky Anti-Virus setup wizard presents the Welcome and License Agreement dialog box that contains the License Agreement. To proceed with the installation, read the agreement thoroughly and accept its terms. Step 2. User data and selecting installation options At this stage, the program automatically detects user information by using data from the operating system registry, and offers two installation options: complete

14 13 Kaspersky Anti-Virus for MS ISA Server installation or custom installation (Fig. 2). If you are installing the entire Kaspersky Anti-Virus application (anti-virus kernel, administration tools, etc.) on an MS ISA Server computer, select complete installation. If you want to install a separate component of Kaspersky Anti-Virus, select custom installation. For example, if you want to remotely manage Kaspersky Anti-Virus, install only the administration console on the administrator s workstation. If you want to install Kaspersky Anti-Virus for ISA Server administration console on a computer, make sure that ISA administration tools are installed on this computer! Figure 2. Setup Type Step 3. Selecting the application components to be installed In this stage, you select the Kaspersky Anti-Virus components to be installed on your computer (Fig. 3). As a rule, these are administration tools for managing Kaspersky Anti-Virus that come together with the Microsoft Management Console. You can also change the location of the administration console.

15 How to install the application 14 Figure 3. Custom Setup. Installing the administration console Step 4. Anti-virus kernel settings In this installation step, you must define the anti-virus protection settings that will be used as default values (Fig. 4). The following settings can be adjusted: File system folder for storing the scan queue. It is recommended that you locate this folder on a disk that has at least 200 Mb of available disk space. Number of queued objects. Folder for storing the anti-virus database that is used to detect and disinfect viruses. Folder for storing temporary files created by the program during its operation. Number of anti-virus kernels run simultaneously. To speed up anti-virus scanning and handling objects, we recommend that you install four anti-virus kernels on one physical processor. Thus, for example, the recommended number of anti-virus kernels running on two physical processors is eight. Each of the above parameters has a default value. To change the current default values, click the corresponding buttons or enter data into the corresponding fields.

16 15 Kaspersky Anti-Virus for MS ISA Server Figure 4. Default settings for the program Immediately after this stage is completed, the program will start copying files to your computer. Step 5. Completing the setup The last step of Kaspersky Anti-Virus installation is restarting MS ISA Server. The server must be restarted in order to load the anti-virus filters included in the package. You can restart the server from either the MS ISA Server console or the setup wizard window if you check the corresponding checkbox (Fig. 5). Note that anti-virus protection of your ISA server will be activated only after you restart MS ISA Server services. After the application is installed, it is recommended that you restart the server to finish registration of all the necessary Kaspersky Anti-Virus services.

17 How to install the application Reinstalling Figure 5. Complete the setup Kaspersky Anti-Virus for ISA Server must be reinstalled if the first installation of the application was incorrect or if you want to install a component of Kaspersky Anti-Virus. To correctly install the anti-virus application, select Repair in the dialog box that appears on your screen (Fig. 6). In this case, the setup wizard will repeat the previous installation procedure. Thus, if the previous installation was a custom type, after you select Repair, the reinstallation procedure will also be performed in custom mode.

18 17 Kaspersky Anti-Virus for MS ISA Server Figure 6. Selecting the reinstallation mode To install an individual component of the anti-virus application on your computer, select Modify. After this, the custom installation dialog box will appear (Fig. 3). To continue with setup, follow the steps described for the first installation Troubleshooting installation problems During installation of Kaspersky Anti-Virus, you might face a number of software problems. Each of these problems results in termination of the Kaspersky Anti- Virus installation. Let us consider the most typical errors and the most common reasons for them.

19 How to install the application 18 Figure 7. Counter registration error This error occurs when the program fails to register performance counters during the installation of Kaspersky Anti-Virus. These performance counters are used in the Windows 2000 operating system to view the statistics of application performance. Figure 8. Error installing the anti-virus application on an ISA Server that is an array member This error occurs when the ISA Server computer on which you install the anti-virus application is an array member. The application cannot be installed on such a server because Kaspersky Anti-Virus for ISA Server does not support this ISA Server mode. If you see this notification on your screen, make sure that the server satisfies the software requirements for installing Kaspersky Anti- Virus. Figure 9. Required Software not Found error The above-listed errors are just a few that can occur during the installation of Kaspersky Anti-Virus. Any critical error usually leads to termination of the installation procedure. To avoid errors, before installing Kaspersky Anti-Virus, take a moment to review the hardware and software requirements listed in section 1.1, on page 5.

20 Chapter 4. Using Kaspersky Anti-Virus for ISA Server The installation package installs Kaspersky Anti-Virus according to the current mode of your ISA Server. After the application is installed, you can immediately start scanning data streams because all the parameters necessary for the scan have been already set by default. The installed application automatically creates the user default, the group default, and the policy default because Kaspersky Anti-Virus can work only when at least one group and one policy have been created. Remember that you cannot delete the default user, group, or policy! 4.1. Default values of scan settings You can configure scan settings on the tabs of the Properties of Kaspersky Anti-Virus for ISA Server dialog box. The following are the default scan settings: The HTTP tab displays settings that regulate the application performance (see section on page 25 for more detail) and messages sent to the client (see section 4.4 on page 40): Maximum scan time for the first chunk of data, sec 300 seconds. Maximum time span between chunks of data sent to the client, sec 60 seconds. Data not sent to the client before scan completes, % 10 %. Enable partial content download enabled. Error messages sent to the client. <html> <head> <title>kaspersky Anti-Virus for Microsoft ISA Server</title> </head> <body> <h1>kaspersky Anti-Virus for Microsoft ISA Server</h1> <p>internal Scanner Error "%ERR_TEXT%"

21 Using Kaspersky Anti-Virus for ISA Server 20 (%ERR%)</p> </body> </html> Message sent to the client about detection of a malicious object: <html> <head> <title>kaspersky Anti-Virus for Microsoft ISA Server</title> </head> <body> <h1>kaspersky Anti-Virus for Microsoft ISA Server</h1> <p>the requested URL "%URL%" is infected with %VIRUSNAME% virus</p> </body> </html> The FTP tab (see section on page 26 for more detail) contains information about data received by the server before the first chunk of data is sent to the client, Kb 8 Kb. The Anti-Virus tab (see section on page 23) lists a set of folders for storing Kaspersky Anti-Virus for ISA Server working data: Folder for storing anti-virus databases: C:/Program Files/Kaspersky Lab/KAV for ISA/bases Folder for scan queue: C:/Program Files/Kaspersky Lab/KAV for ISA/TaskQueue Folder for temporary files: C:/Program Files/Kaspersky Lab/KAV for ISA/Temp Number of anti-virus kernels run simultaneously 4 kernels. Scan queue size 1024 objects. Scanning settings: o o o Disinfect objects if possible Scan archives Scan compressed executable files The Licensing tab (see section 4.7 on page 48) displays the number of days the administrator will be notified about the license expiry. The number of days is set in the Notify about license expiration field and it is seven days by default. The administrator is notified by messages displayed in

22 21 Kaspersky Anti-Virus for MS ISA Server the system log on the computer running Kaspersky Anti-Virus for ISA Server. The Updating tab (see section 4.3 on page 38) contains settings for updating the anti-virus database and the frequency of its updating. By default, updating starts every day at 11:15 p.m. The update server is randomly selected from the list Managing scans During installation, the Kaspersky Anti-Virus administration console is built into MMC. The scanning process is managed using the Kaspersky Anti-Virus for ISA Server main window shown in Fig. 10. The tree consists of two branches: Groups and Policies. The view of branches on the right side of the main window can be customized. By default, all application branches and possible manipulations with them are displayed as Taskpad view. You can change the view to Advanced by selecting the corresponding item from the shortcut menu. To open the shortcut menu, right-click the Kaspersky Anti-Virus 2 tree branch (Fig. 11). To configure scanning settings, use the following capabilities of Kaspersky Anti- Virus for ISA Server. With these you can: Edit the general parameters affecting Kaspersky Anti-Virus performance, including all anti-virus scanning policies (see section on page 22). Set up new rules for anti-virus protection that differs from the default rules. The new rules are added by creating new policies (see section on page 32). In the new policy, you can redefine the settings for traffic filtering and then assign a group of users to the policy created. 2 Below, the description of the main window elements refers to their Taskpad view.

23 Using Kaspersky Anti-Virus for ISA Server 22 Figure 10. The Kaspersky Anti-Virus for MS ISA Server main window Figure 11. Shortcut menu Configuring general settings of antivirus scanning The administrator may need to change general settings of anti-virus protection. To edit general settings of anti-virus scanning:

24 23 Kaspersky Anti-Virus for MS ISA Server In the Kaspersky Anti-Virus main window, select Edit Kaspersky Anti- Virus settings to open the Properties of Kaspersky Anti-Virus for ISA Server dialog box. The general settings of anti-virus scanning are available on the Anti-Virus, HTTP, and FTP tabs General settings On the Anti-Virus tab (Fig. 12), you can make changes to the general settings of Kaspersky Anti-Virus that affect the application performance. Figure 12. The Anti-Virus tab In the three fields located in the upper part of the tab, you can edit the default paths to the Kaspersky Anti-Virus working folders. These folders are used to store: The anti-virus database that is used during anti-virus scanning. The scan queue. Here the program places objects that are to be scanned, being scanned, or those that have been scanned and are ready for delivery to the client.

25 Using Kaspersky Anti-Virus for ISA Server 24 Temporary files. When protection of archives and compressed executable files is enabled, Kaspersky Anti-Virus places the extracted files in the temporary folder. After scanning, the temporary files are deleted. Kaspersky Anti-Virus for MS ISA Server can run simultaneously with other anti-virus programs in order to protect the file system of your computer (for example, Kaspersky Anti-Virus for Microsoft NT Server). In this case, the correct operation of Kaspersky Anti-Virus for MS ISA Server requires that the folders for the scan queue and temporary files be excluded from scans by these additional programs. To enhance the efficiency in processing large amounts of data, Kaspersky Anti- Virus can simultaneously run several anti-virus kernels. By default, four antivirus kernels are formed and run simultaneously during application startup. To change the number of anti-virus kernels run simultaneously: Enter the required number to the Number of anti-virus kernels run simultaneously field. You can select up to 32 anti-virus kernels to be run simultaneously. It is recommended that you run four anti-virus kernels on one physical processor. To change the scan queue size: Specify the maximum number of queued objects that can be simultaneously placed in the working folder into the Scan queue size numeric field. In the lower part of the tab, you can see Scanning settings (Fig. 12): If you want your Kaspersky Anti-Virus to disinfect an infected file upon detection, check the Disinfect objects if possible box. Only files transferred via the HTTP protocol can be disinfected. An infected file sent by the FTP protocol will not be disinfected; the program will block access to the infected object. If you want to enable extracting and scanning of archives, check the Scan archives box. If the tool for extracting archives is disabled, the archives will be scanned as normal files. In this case, the program will detect only those viruses that have penetrated the archived file. Kaspersky Anti-Virus does not scan password-protected archives!

26 25 Kaspersky Anti-Virus for MS ISA Server If you want to scan compressed executable files, check the Scan compressed executable files box. As for archives, if this option is disabled, executable files will be scanned as uncompressed. The program will detect only those viruses that have penetrated the compressed file. Since all these modes increase the load on your computer resources during antivirus scans, this can delay sending files to the client Settings for HTTP scanning On the HTTP tab (Fig. 13), you can modify settings for scanning HTTP traffic and set restrictions for processing data transferred via the HTTP protocol. Here you can also edit messages sent to the clients. Figure 13. The HTTP tab In the upper three fields, specify the settings for HTTP scanning: Enter the maximum delay time for a chunk of data scanned by the application in the Maximum scan time for the first chunk of data, sec field. This field specifies the time limit for scanning data. After the limit is reached, scanning is converted into a stream and sent to the client upon request. This parameter affects the way infected files are treated after they are detected:

27 Using Kaspersky Anti-Virus for ISA Server 26 If an infected file has been detected and disinfected before the first chunk of data containing a part of this file was sent to the client, the client receives the disinfected file. If an infected file was detected after the first chunk of data containing a part of this infected file had been sent to the client, the program terminates the connection. Upon the second request for this file, the client will be immediately notified that the requested file is infected. Upon the second request for this file, the client will be notified that the requested file is infected only if the time span between the first and the second requests does not exceed 100 sec. This value cannot be changed in this version of the program. Specify the time span for sending the next chunk of data to the client upon request in the Maximum time span between chunks of data sent to the client, sec field. The value of this field cannot exceed the value of the Maximum scan time for the first chunk of data, sec field. Set the percentage of data accumulated by Kaspersky Anti-Virus for subsequent analysis and scanning in the Data not sent to the client before scan completes, % field. The Enable partial content download checkbox enables partial downloading of data in cases, for example, of an Internet connection failure when downloading a file. However, note that Kaspersky Anti-Virus is able to detect a malicious code only if the entire code is present in any part of the downloaded file. If the viral code is divided into separate parts, Kaspersky Anti-Virus might fail to detect it. In such a case, after the integrity of the downloaded object is restored, the virus might penetrate your system. For more information about the fields for editing messages sent to the client, see section. 4.4 on page 40. At any time during editing the current settings, you can return to default settings by clicking the Set default values button Settings for FTP scanning On the FTP tab (Fig. 14), you can modify settings for scanning ISA Server data transmitted via the FTP and FTP over HTTP protocols.

28 27 Kaspersky Anti-Virus for MS ISA Server In addition to the anti-virus protection mode, you can specify the amount of data transmitted via the FTP protocol and collected by the server for subsequent analysis. After the server receives the specified amount of data, the data is sent to the client. The maximum value of this field is 1024 Kb. At any time during editing the current settings, you can return to default settings by clicking the Set default values button. Figure 14. The FTP tab Managing groups Each group includes local network clients; each client can be a member of one or several groups. The same policy can be applied to different groups. All ISA Server clients that do not belong to any group are assigned to the default group. If a client is a member of several groups, it is scanned for viruses using settings for the group with the mildest rules of anti-virus protection. An example is a client belonging both to the Accountant Department group for which these chunks of data are scanned, and to the Administrator group for which these chunks of data are excluded from scanning.

29 Using Kaspersky Anti-Virus for ISA Server 28 In the present version of Kaspersky Anti-Virus, clients are defined by their IP address or a group of IP addresses. Clients with a specified IP address can be computers with pre-set network services and static IP addresses, for example, mail servers. For network clients that do not have static IP addresses, you can create one client and specify the subnet address and subnet mask. To switch to the list of groups: Select Manage groups in the Kaspersky Anti-Virus main window. The Manage groups of Kaspersky Anti-Virus clients dialog box will appear on your screen (Fig. 15). You can also open the Manage groups of Kaspersky Anti-Virus clients dialog box by selecting the Groups node in the tree. The administrator can rename existing groups, change their descriptions, create new groups, and delete old groups. Figure 15. The Manage groups of Kaspersky Anti-Virus dialog box To create a new group: 1. Select the Create a group option.

30 29 Kaspersky Anti-Virus for MS ISA Server 2. In the Create a Group dialog box (Fig. 16), enter the name and description of the new group. Figure 16. Creating a new group 3. In the next dialog box (Fig. 17), click Add clients Figure 17. Adding clients to a new group 4. In the Clients dialog box (Fig. 18), either select a client from the list of existing clients or create a new client by clicking New

31 Using Kaspersky Anti-Virus for ISA Server 30 Figure 18. The Clients dialog box 5. If you select New, you will see the Client Properties dialog box (Fig. 19). In this dialog box, fill in the Client name field and select one of the following options: One IP address to add a client with a static IP address. Subnet to add a client specified by a subnet mask. Range of IP addresses to specify a range of IP addresses for a client. Figure 19. Adding a new client to a group 6. After the new clients are included in a group, click Finish to finish creating a group.

32 31 Kaspersky Anti-Virus for MS ISA Server The newly created group is assigned to the default policy. To change the description and contents of the clients in a group: Select the required group in the Manage groups of Kaspersky Anti- Virus clients (Fig. 15) and click Edit group properties. This will open the Group properties dialog box. On the General tab of this dialog box (Fig. 20), change the name and description of the group. On the Clients tab (Fig. 21), you can add a client or delete an existing client from the group. If you delete an existing client, information about this client is deleted only from the group you are currently editing. Figure 20. The General tab Figure 21. The Clients tab To delete a group: Select the required group in the Manage groups of Kaspersky Anti- Virus clients dialog box (Fig. 15) and click Delete a group.

33 Using Kaspersky Anti-Virus for ISA Server Specifying policies for anti-virus scanning A specific policy can be assigned to each group of clients. The anti-virus policies define additional settings of filtering incoming traffic for different groups of clients, thus increasing the speed of anti-virus scanning. Only one policy can be assigned to each group. For example, the Administrators policy is assigned to the Administrators group; no other policy can be assigned to this group. To switch to the list of policies: Select Manage policies in the Kaspersky Anti-Virus main window. You will see the Manage Kaspersky Anti-Virus policies dialog box (Fig. 22). You can also switch to the Manage Kaspersky Anti-Virus policies dialog box by clicking Policies in the tree. Figure 22. The Manage Kaspersky Anti-Virus policies dialog box To create a new policy: 1. Select Create a policy. 2. In the Create a Policy dialog box (Fig. 23), enter the name and a description of the policy.

34 33 Kaspersky Anti-Virus for MS ISA Server Figure 23. Creating a new policy 3. In the next dialog box (Fig. 24), click Add group and select a group of clients to be assigned to the new policy. Figure 24. Adding a group of clients 4. In the Add Trusted Servers to a Policy dialog box (Fig. 25), click Add a server to exclude incoming traffic from these servers from anti-virus scanning. In the Trusted Server dialog box (Fig. 31), enter the description of the server and its properties (see section on page 36 about trusted servers). After the list of trusted servers is complete, click Next.

35 Using Kaspersky Anti-Virus for ISA Server 34 Figure 25. Adding trusted servers 5. The Add Trusted Object Types to a Policy dialog box (Fig. 26) will appear on your screen. In this dialog box, click Add a object type to add a type of object to be excluded from anti-virus scanning (see section on page 37 for more details). Figure 26. Adding a mime type 6. After the list of trusted objects is complete, click Finish. To edit policy settings: In the Manage Kaspersky Anti-Virus policies dialog box (Fig. 22), select the policy and click Edit policy settings.

36 35 Kaspersky Anti-Virus for MS ISA Server On the General tab of the new dialog box (Fig. 27), you can rename the policy and change its description. On the Groups tab (Fig. 28), you can change the list of groups assigned to this policy, add a new group to the list of groups, or delete a group from the list. Figure 27. The General tab Figure 28. The Groups tab On the Servers tab (Fig. 29) and the Object Types (Fig. 30) tab, you can edit the list of trusted servers and objects excluded from scans for this anti-virus policy. Figure 29. The Servers tab Figure 30. The Object Types tab

37 Using Kaspersky Anti-Virus for ISA Server 36 To delete a policy: In the Manage Kaspersky Anti-Virus policies dialog box (Fig. 22), select a policy and click Delete a policy. After a policy is deleted, all groups of clients assigned to this policy are automatically assigned to the default policy Managing a list of trusted servers For each policy, the administrator can specify trusted servers. The incoming traffic from these servers is excluded from anti-virus protection. This list only contains names of servers from which traffic cannot contain any malicious objects. The larger the list of trusted servers, the less Kaspersky Anti-Virus intrudes into the data streams requested by the clients of the groups assigned to this policy. The list of trusted servers can be managed from the Servers tab (Fig. 29) of the Policy properties dialog box. When a new trusted server is added to the list, the program opens the Trusted server dialog box (Fig. 31). Here you can configure settings for this trusted server by specifying one of the following items: Server domain name. Server IP address. Subnet. Range of IP addresses.

38 37 Kaspersky Anti-Virus for MS ISA Server Figure 31. Adding a trusted server To delete a trusted server from the list, click the corresponding button on the Servers tab Creating a list of objects excluded from scans Reducing the types of object excluded from anti-virus scans, as well as the list of trusted servers, in turn reduces the load on the resources of the ISA Server computer. The list of object types is managed from the Object Types tab (Fig. 30) of the Policy properties dialog box. When a new type is added, the Object Type dialog box appears (Fig. 32). Figure 32. Adding types of objects

39 Using Kaspersky Anti-Virus for ISA Server Updating the anti-virus database Updates to your anti-virus database can be downloaded on demand or automatically (scheduled). The updated anti-virus database can be downloaded from: the Internet via the FTP or HTTP protocol from Kaspersky Labs update servers; from a local or shared folder. Updating of the anti-virus database is managed from the Updating tab of the Properties of Kaspersky Anti-Virus for ISA Server dialog box (Fig. 33). By default, the database is updated every day from Kaspersky Labs update servers. Figure 33. Configuring update settings To set the program to update the anti-virus database from the Internet, follow these steps: 1. Select Update from Internet.

40 39 Kaspersky Anti-Virus for MS ISA Server 2. Click Settings for updating from Internet to define the source of updates. 3. In the new dialog box (Fig. 34): Choose Select update server automatically if you want to retrieve updates from a random server. Choose From the specified server only if you want to retrieve updates from a user-defined server. Enter the server address in the corresponding field. 4. In the Use HTTP proxy part, enter the HTTP proxy parameters if such a proxy is used in your system: Select Use local proxy of the ISA server to use a local proxy of the ISA server to update the anti-virus database via the Internet. Select Use other proxy server, and in the Proxy name and port fields enter the proxy name and port that differ from the local proxy of the ISA server. 5. In the FTP settings part, check the corresponding box to use passive FTP for retrieving updates through FTP. Figure 34. Configuring updating from the Internet

41 Using Kaspersky Anti-Virus for ISA Server 40 To update your anti-virus database from a local folder: Select Update from a local or shared folder and enter the full path to the desired folder. The results of each database updating session are saved in the updater.log file. In the Path to updating log field, change the name and location of the report log Scheduled updating of the anti-virus database To enable automatic updating of your anti-virus database, check the Automatically update anti-virus databases box. The anti-virus database is updated as often as set by the ISA Server administrator. By default, the database is updated every day at 11:15 p.m. In the three fields shown below (Fig. 33), you can change the frequency and time of updating the anti-virus database On-demand updating On the Updating tab, click Update now to start downloading the updated antivirus database according to the current settings. You can update the anti-virus database on demand regardless of whether scheduled updating of the anti-virus database is enabled or disabled. The Status field displays the current updating status Managing notifications If Kaspersky Anti-Virus detects an infected file that cannot be disinfected in a data stream, the connection terminates and the client that requested these data receives an HTML message about detection of a virus.

42 41 Kaspersky Anti-Virus for MS ISA Server Messages are formed only if the malicious object was detected by Kaspersky Anti-Virus Web Filter or Kaspersky Anti-Virus HTTP Application Filter. The following is the default message created in the Message sent to the client about detection of a malicious object field (Fig. 13): <html> <head> <title>kaspersky Anti-Virus for Microsoft ISA Server</title> </head> <body> <h1>kaspersky Anti-Virus for Microsoft ISA Server</h1> <p>the requested URL "%URL%" is infected with %VIRUSNAME% virus</p> </body> </html> The following extensible variables are used in the message text: %URL% the URL of the Internet resource requested by the client. %VIRUSNAME% the name of the virus that infected a data stream. If an internal system error occurs after the request is sent, the client that requested the data receives the following HTML message formed in the Error message sent to the client field on the HTTP tab of the Properties of Kaspersky Anti-Virus for ISA Server dialog box (Fig. 13): <html> <head> <title>kaspersky Anti-Virus for Microsoft ISA Server</title> </head> <body> <h1>kaspersky Anti-Virus for Microsoft ISA Server</h1> <p>internal Scanner Error "%ERR_TEXT%" (%ERR%)</p> </body> </html> The following extensible variables are used in the message text: %ERR_TEXT% error description %ERR% error code On the HTTP tab of the Properties of Kaspersky Anti-Virus for ISA Server dialog box, you can edit messages sent to the client (Fig. 13). The maximum message length is bytes and the code page is win1251.

43 Using Kaspersky Anti-Virus for ISA Server Testing Kaspersky Anti-Virus operation After installing and adjusting Kaspersky Anti-Virus, we recommend that you test its settings and operation of the program using a test virus or its modifications. The test virus was specially designed by the organization (The European Institute for Computer Antivirus Research) for testing anti-virus products. The test virus IS NOT ACTUALLY A VIRUS because it does not contain code that can really harm your computer. However, most anti-virus products identify this file as a virus. Never use real viruses to test the operation of an anti-virus product! You can download the test virus from the official website of the EICAR organization at When the file is being downloaded from the EICAR website, the anti-virus program will detect it, label it as infected, fail to disinfect it, and apply the action defined by the administrator for handling such objects. Thus, under default settings (see section 4.1 on page 19), the Internet connection will be terminated and you will see a warning about downloading an object infected with the eicar virus Application statistics and diagnostics You can view Kaspersky Anti-Virus performance statistics using standard counters and modify options for notifying the administrator upon critical events. You can also have Kaspersky Anti-Virus log statistics to diagnose problems that might occur when the program is filtering data streams. This section discusses these features in more detail Recording and viewing statistics The Kaspersky-Anti-Virus performance statistics can be managed and viewed using standard Windows performance counters that are available from the

44 43 Kaspersky Anti-Virus for MS ISA Server Performance console (Start -> Settings -> Control Panel -> Administration Tools -> Performance). The following performance parameters are logged: Disinfected objects. Infected (not cured) objects. Corrupted objects. Unscanned objects. Scan errors. Suspicious objects. Failed scans. Scanned objects. Clean objects. Scan queue size. Scanned traffic, Kb. Number of usual, directed, and complex data loads by each Kaspersky Anti-Virus filter (FTP, HTTP, and Web filters). To select the parameters to be logged: 1. Switch to the Add Counters dialog box (Fig. 35) and select Use local computer counters if ISA Server is managed from an ISA Server computer, or Select counters from computer if ISA Server is managed from a remote administrator s workstation. 2. From the Performance Object drop-down list, select the KL4ISA object. A list of parameters currently logged appears in the lower left field: Select All counters if you want to view statistics of all the parameters of Kaspersky Anti-Virus performance, and click Add. Choose Select counters from list if you want to view information only on specified parameters of the application performance. Then, select a necessary counter from the list and click Add.

45 Using Kaspersky Anti-Virus for ISA Server 44 Figure 35. Customizing statistics The following settings are required to view counters from a remote computer! 3. To view statistics from a remote computer, you must be granted the following permissions on the computer where Kaspersky Anti-Virus for MS ISA Server is installed: Read access to the following files: %windir%\system32\perfcxxx.dat %windir%\system32\perfhxxx.dat Read access to the following registry keys: HKEY_LOCAL_MACHINE\Software\Microsoft\WindowsNT \CurrentVersion\Perflib HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Con trol\securepipeservers\winreg Read and write access to the following key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Ser vices\anti-virus KL for MS ISA System privileges (assigned from Control Panel -> Administrative tools -> Local Security Policy -> Security settings -> Local Policies -> User permissions): o Profile System Performance.

46 45 Kaspersky Anti-Virus for MS ISA Server o Profile Single Process. The above list of permissions is described in Microsoft Knowledge Base Article Q at By default, these permissions are granted to users from the Administrators group on the computer where Kaspersky Anti-Virus for MS ISA Server is installed. 4. To view statistics on a server with Kaspersky Anti-Virus for MS ISA Server from a remote computer, the following services must be enabled: o Remote Registry Administration. o NetBIOS access (check the File and Printer Sharing for Microsoft Networks checkbox in My Network Places -> Properties -> LAN -> Properties). In addition to the statistics, the program logs results on filtering data streams by Kaspersky Anti-Virus Web and HTTP filters. These logs record all detected malicious objects. The reports on the data streams scanned by Kaspersky Anti-Virus Web Filter are saved in the <WINDIR>\isavweb.log file, and those scanned by Kaspersky Anti-Virus HTTP Application Filter, in the <WINDIR>\isavbr.log file (<WINDIR> is the full path to the directory where Kaspersky Anti-Virus for MS ISA Server has been installed. See section on page 12). The current version of the application does not log reports on infected objects detected by Kaspersky Anti-Virus FTP Application Filter. The maximum size of each file is 20 Mb. If the file size exceeds the limit, the file is renamed to <file_name><number>.log, and new records are logged in the previous file. For example, if the isavweb.log file size exceeds 20 Mb, it is renamed to isavweb2.log, and the new records are saved in the isavweb.log file Notifying the administrator using ISA Server Alerts Using ISA Server Alerts system tools, you can notify administrator upon critical events that might occur during performance of applications installed on ISA Server. The administrator can be informed by various means, such as logging events to system log, sending notifications by , etc.

47 Using Kaspersky Anti-Virus for ISA Server 46 The administrator must immediately response to some critical events related to Kaspersky Anti-Virus performance. For example, a critical event is Your license expires in 14 days (see Figure 36). Kaspersky Anti-Virus critical events are added to the existing list of critical events after the application is installed on the server. You can customize how you will be notified upon such events. Figure 36. Customizing notifications upon critical events Configuring diagnostics options for the application Kaspersky Anti-Virus allows you to diagnose program performance and record results in the following log files: kavisadate.log Kaspersky Anti-Virus log that stores information about application performance during the designated time period. In the file name, DATE is the date of creation of this file in the format YearMonth- Date, for example, kavisa log. If the program is trying to add report to the file while you are currently editing the file, Kaspersky Anti-Virus will create a new file with a slightly modified name, for example, kavisa _1.log.

48 47 Kaspersky Anti-Virus for MS ISA Server viruslogdate.log Kaspersky Anti-Virus log file that stores information about malicious objects detected during scans. You can custom the report detail level on the Diagnostics tab (see Figure 37). Time of events, written to the above-listed event logs, is displayed in Universal Coordinated Time (UTC) format Figure 37. Diagnostics options for Kaspersky Anti-Virus All critical events related to Kaspersky Anti-Virus performance are also saved to the Windows system log. In the left pane of the tab, you can select tasks, such as Updating anti-virus database, Licensing, etc. The right pane shows types of messages generated by Kaspersky Anti-Virus for the selected task and their detail level. For any type of messages, you can select one of the following detail levels: None Do not log any information. Minimum Record only main events, for example, application startup and shutdown, etc.

49 Using Kaspersky Anti-Virus for ISA Server 48 Medium In addition to main event, log additional events describing Kaspersky Anti-Virus performance in more detail (for example, errors when connecting to update servers). Maximum Log all possible information on application performance, except for debugging messages. Debug Log all information, including debugging messages. Here you can also set the frequency of refreshing the log files and their number Managing license keys The license keys are managed on the Licensing tab of the Properties of Kaspersky Anti-Virus for ISA Server dialog box (Fig. 38). A valid license key allows you to take advantage of all available features of Kaspersky Anti-Virus. If you have not yet decided to purchase a full version of Kaspersky Anti-Virus, we can provide you with a trial key valid for two weeks or a month. After the trial period expires, the key will be blocked and will not be able to scan data streams for viruses. You cannot use a trial key more than once! If you have no license key for Kaspersky Anti-Virus for ISA Server or your license key does not match the application, you cannot use Kaspersky Anti- Virus. After the license expires, Kaspersky Anti-Virus for MS ISA Server retains its functionality except for the update service. You will be able to scan data streams for viruses using the out-of-date database. In this case, we do not guarantee 100% protection from new viruses that appear after your Anti-Virus license expires. Even if you download the anti-virus database manually from Kaspersky Labs websites and copy the updates to the corresponding folder on your server, the program will not use this database. If you fail to find the license key in the distribution kit, contact the distributor who sold you this copy of the product.

50 49 Kaspersky Anti-Virus for MS ISA Server Renewing your license If your license has expired, you need to renew it to restore the functionality of the program, i. e., you must purchase a new license key. Kaspersky Anti-Virus will not update the anti-virus database until your license is renewed, and, hence we do not guarantee 100% protection from viruses. To renew your license, you need to: Contact the seller of your copy of the product and purchase a new Kaspersky Anti-Virus license key, or Purchase a license key at Kaspersky Labs. Write a letter of request directly to the Sales Department of our company (sales@kaspersky.com) or fill in the corresponding form on our website ( in the E-Store section. After your payment is received, we will send you a license key at the address indicated in the corresponding field of your order. Figure 38. Managing license keys