Barracuda Networks 4 Dokumentacja

1Barracuda Networks Inc.3175 S. WInchester BlvdCampbell, CA 95008http://www.barracuda.comBarracuda Web Filter Administrator’s GuideVersion 3.3

Barracuda Web Filter Release 3.310 Chapter 1: IntroductionThe following figure shows how Barracuda Central provides the latest rules and definitions t

Administrator’s GuideDeploying the Barracuda Web Filter 11Deploying the Barracuda Web FilterYou can deploy your Barracuda Web Filter so it is either

Barracuda Web Filter Release 3.312 Chapter 1: IntroductionFigure 1.2: Inline Pass-through Deployment

Administrator’s GuideDeploying the Barracuda Web Filter 13Forward proxyThe forward proxy deployment uses a proxy as an intermediary between a client

Barracuda Web Filter Release 3.314 Chapter 1: IntroductionFigure 1.3: Forward Proxy Deployment

15Chapter 2Installation and ConfigurationThis chapter provides general instructions for installing the Barracuda Web Filter.This chapter covers the fo

Barracuda Web Filter Release 3.316 Chapter 2: Installation and ConfigurationNetwork considerations The Barracuda Web Filter appliance is a low-risk de

Administrator’s GuideNetwork considerations 17Firewall DMZA demilitarized zone (DMZ) is an area where any servers that access the Internet are placed

Barracuda Web Filter Release 3.318 Chapter 2: Installation and ConfigurationInstalling and configuring the Barracuda Web FilterThese are the general s

Administrator’s GuideInstalling and configuring the Barracuda Web Filter 19Figure 2.1: Connecting the Barracuda Web Filter to your NetworkThe Barracu

2 Barracuda Web Filter Administrator’s GuideCopyright NoticeCopyright 2004-2008, Barracuda Networkswww.barracuda.comv33-080413-01-0413 All rights

Barracuda Web Filter Release 3.320 Chapter 2: Installation and ConfigurationTo set a new IP address from the administrative console:1. Connect your ke

Administrator’s GuideInstalling and configuring the Barracuda Web Filter 21To configure the Barracuda Web Filter:1. From a Web browser, enter the IP

Barracuda Web Filter Release 3.322 Chapter 2: Installation and ConfigurationUpdating the firmware may take several minutes. Do not turn off the unit d

Administrator’s GuideInstalling and configuring the Barracuda Web Filter 233.Enable your subscription: 3a. Click the Activate link as shown in Figure

Barracuda Web Filter Release 3.324 Chapter 2: Installation and ConfigurationStep 10. Test and adjust the Barracuda Web FilterAfter connecting your Bar

Administrator’s GuideInstalling and configuring the Barracuda Web Filter 25Figure 2.4: Connecting the Barracuda Web Filter to your Network2. Connect

Barracuda Web Filter Release 3.326 Chapter 2: Installation and ConfigurationAdvanced installation topicsThis section describes advanced installation t

Administrator’s GuideAdvanced installation topics 27Figure 2.5: Inline Passthrough with Pre-existing Proxy Server DeploymentSupported pre-existing pr

Barracuda Web Filter Release 3.328 Chapter 2: Installation and Configurationthe default port 80, this method captures most of the HTTP request traffic

Administrator’s GuideAdvanced installation topics 29Figure 2.6: Proxy Behind the Barracuda Web Filter2. Connect the Ethernet cable from your WAN port

Administrator’s Guide 3ContentsChapter 1 – Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 7Overview . . . . . . . . . . .

Barracuda Web Filter Release 3.330 Chapter 2: Installation and Configuration

31Chapter 3Configuring, Monitoring, and Managing theBarracuda Web FilterThis chapter describes the configuration, monitoring, and management tasks you

Barracuda Web Filter Release 3.332 Chapter 3: Configuring, Monitoring, and Managing the Barracuda Web FilterConfiguring the Barracuda Web FilterThis s

Administrator’s GuideConfiguring the Barracuda Web Filter 334.From the ADVANCED > Linked Management on Barracuda Web Filter 2:4a. Enter the Cluste

Barracuda Web Filter Release 3.334 Chapter 3: Configuring, Monitoring, and Managing the Barracuda Web FilterSwitching a system to standby modeYou can

Administrator’s GuideConfiguring the Barracuda Web Filter 35Enabling and disabling virus protectionUse the BASIC > Virus Checking page to turn off

Barracuda Web Filter Release 3.336 Chapter 3: Configuring, Monitoring, and Managing the Barracuda Web FilterCreating block and accept filtersThis sect

Administrator’s GuideCreating block and accept filters 37Figure 3.2: Block Message with Login FieldsFiltering and blocking featuresThis section descr

Barracuda Web Filter Release 3.338 Chapter 3: Configuring, Monitoring, and Managing the Barracuda Web FilterYou can use the Applications filter as a p

Administrator’s GuideCreating block and accept filters 39MIME type blockingUse the BLOCK/ACCEPT > MIME Blocking page to specify standard MIME type

Barracuda Web Filter Release 3.34:Setting up linked management . . . . . . . . . . . . . . . . . . . . . . . . . 32Data prop

Barracuda Web Filter Release 3.340 Chapter 3: Configuring, Monitoring, and Managing the Barracuda Web FilterAbout the Barracuda Spyware Removal ToolTh

Administrator’s GuideCreating block and accept filters 41Or you may want to create an exception policy that allows a subset of your users to access c

Barracuda Web Filter Release 3.342 Chapter 3: Configuring, Monitoring, and Managing the Barracuda Web FilterLimitations for HTTPS traffic filteringWhe

Administrator’s GuideMonitoring the Barracuda Web Filter 43Monitoring the Barracuda Web FilterThis section describes the monitoring tasks you can per

Barracuda Web Filter Release 3.344 Chapter 3: Configuring, Monitoring, and Managing the Barracuda Web FilterFigure 3.3: Indicator LightsTable 3.2 desc

Administrator’s GuideMonitoring the Barracuda Web Filter 45You can perform the following operations on the Log page:• Apply filters to locate specifi

Barracuda Web Filter Release 3.346 Chapter 3: Configuring, Monitoring, and Managing the Barracuda Web FilterAutomating the delivery of system alerts a

Administrator’s GuideMonitoring the Barracuda Web Filter 47Some of the tasks that the Barracuda Web Filter tracks include:• Linked management setup•

Barracuda Web Filter Release 3.348 Chapter 3: Configuring, Monitoring, and Managing the Barracuda Web FilterManaging the Barracuda Web FilterThis sect

Administrator’s GuideManaging the Barracuda Web Filter 49We recommend that the Automatically Update setting for your spyware and virus definitions be

Administrator’s Guide 5Chapter 4 – Managing Users and Groups . . . . . . . . . . . . . . 53Overview . . . . . . . . . . . . . . . . .

Barracuda Web Filter Release 3.350 Chapter 3: Configuring, Monitoring, and Managing the Barracuda Web FilterRebooting the system in recovery modeIf yo

Administrator’s GuideManaging the Barracuda Web Filter 51Reboot optionsTable 3.3 describes the options available at the reboot menu.Table 3.3: Reboot

Barracuda Web Filter Release 3.352 Chapter 3: Configuring, Monitoring, and Managing the Barracuda Web Filter

53Chapter 4Managing Users and GroupsThis chapter explains how to manage users and groups on your Barracuda Web Filter. This chapter covers the followi

Barracuda Web Filter Release 3.354 Chapter 4: Managing Users and GroupsOverviewThe Barracuda Web Filter distinguishes between two basic classes of the

Administrator’s GuideCreating local users and groups 55Creating local users and groupsThis section describes how to create local accounts that you ca

Barracuda Web Filter Release 3.356 Chapter 4: Managing Users and GroupsIntegrating with a user authentication serviceYou can integrate the Barracuda W

Administrator’s GuideIntegrating with a user authentication service 57Communication between the LDAP domain controller servers and the Barracuda Web

Barracuda Web Filter Release 3.358 Chapter 4: Managing Users and Groups1.A user logs into their domain and is authenticated by the domain controller.2

Administrator’s GuideIntegrating with a user authentication service 59Enabling NTLM domain user authenticationIf your network uses an NT LAN Manager

Barracuda Web Filter Release 3.36:Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Barracuda Web Filter Release 3.360 Chapter 4: Managing Users and GroupsTo enable NTLM user authenticationTo enable NTLM user authentication, go to the

Administrator’s GuideViewing and managing accounts 61Viewing and managing accountsThe USERS/GROUPS > Account View page displays all the user accou

Barracuda Web Filter Release 3.362 Chapter 4: Managing Users and Groups

63Appendix AAbout the Barracuda Web Filter HardwareThis appendix provides hardware information for the Barracuda Web Filter. The following topics are

Barracuda Web Filter Release 3.364 Appendix A: About the Barracuda Web Filter HardwareFront panel of the Barracuda Web FilterFigure A.1, Figure A.2, a

Administrator’s GuideFront panel of the Barracuda Web Filter 65Barracuda Web Filter 610Figure A.2 shows the front components as described in Table A.

Barracuda Web Filter Release 3.366 Appendix A: About the Barracuda Web Filter HardwareBarracuda Web Filter 810 and 910Figure A.3 shows the front compo

Administrator’s GuideFront panel of the Barracuda Web Filter 6713 Hard Disk Drive #4 ActivityDisplays the activity for hard disk drive #414 WAN Port

Barracuda Web Filter Release 3.368 Appendix A: About the Barracuda Web Filter HardwareBack panel of the Barracuda Web FilterFigure A.4, Figure A.5, an

Administrator’s GuideBack panel of the Barracuda Web Filter 69Barracuda Web Filter 610Figure A.5 shows the back components as described in Table A.5.

7Chapter 1IntroductionThis chapter provides an overview of the Barracuda Web Filter and includes the following topics:• Overview on page 8• Deploying

Barracuda Web Filter Release 3.370 Appendix A: About the Barracuda Web Filter HardwareTable A.6 describes the back components on the Barracuda Web Fil

Administrator’s GuideHardware compliance 71Hardware complianceThis section contains compliance information for the Barracuda Web Filter hardware.Noti

Barracuda Web Filter Release 3.372 Appendix A: About the Barracuda Web Filter Hardware

73Appendix BRegular ExpressionsYou can use regular expressions in many of the Barracuda Web Filter features. Regular Expressions allow you to flexibly

Barracuda Web Filter Release 3.374 Appendix B: Regular ExpressionsUsing special characters in expressionsThe following characters have a special meani

75Appendix CLimited Warranty and LicenseLimited warrantyBarracuda Networks, Inc., or the Barracuda Networks, Inc. subsidiary or authorized Distributor

Barracuda Web Filter Release 3.376 Appendix C: Limited Warranty and LicenseExclusions and restrictionsThis limited warranty does not apply to Barracud

Administrator’s Guide 774. This License is effective until terminated. This License is automatically terminated without notice if you fail to comply

Barracuda Web Filter Release 3.378 Appendix C: Limited Warranty and LicensePRODUCT FOR A FULL REFUND. YOUR RIGHT TO RETURN AND REFUND EXPIRES 30 DAYS

Administrator’s Guide 79APPLICABLE FEE FOR THE UPGRADE; (2) USE OF UPGRADES IS LIMITED TO BARRACUDA NETWORKS EQUIPMENT FOR WHICH CUSTOMER IS THE ORIGI

Barracuda Web Filter Release 3.38 Chapter 1: IntroductionOverviewThe Barracuda Web Filter is an integrated anti-spyware and content filtering solution

Barracuda Web Filter Release 3.380 Appendix C: Limited Warranty and LicenseRestricted Rights. Barracuda Networks' commercial software and commerc

Administrator’s Guide 81Open Source LicensingBarracuda products may include programs that are covered by the GNU General Public License (GPL) or other

Barracuda Web Filter Release 3.382 Appendix C: Limited Warranty and License0. This License applies to any program or other work which contains a notic

Administrator’s Guide 833. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form under th

Barracuda Web Filter Release 3.384 Appendix C: Limited Warranty and LicenseIf any portion of this section is held invalid or unenforceable under any p

Administrator’s Guide 85FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBI

Barracuda Web Filter Release 3.386 Appendix C: Limited Warranty and LicenseBarracuda Products may contain programs that are copyright (c)1995-2005 Int

Administrator’s Guide 87acknowledgment: "This product includes software developed by Computing Services at Carnegie Mellon University (http://www

Barracuda Web Filter Release 3.388 Appendix C: Limited Warranty and Licensecontrol systems, and issue tracking systems that are managed by, or on beha

Administrator’s Guide 896. Trademarks. This License does not grant permission to use the trade names, trademarks, service marks, or product names of t

Administrator’s GuideOverview 9The Barracuda Web Filter scans inbound traffic for the following malware over HTTP port 80 and FTP port 21: spyware (s

Barracuda Web Filter Release 3.390 Appendix C: Limited Warranty and Licensemedia, package the media, and mail the media. Please send a check payable

91Aaccounts, creating 55Active mode 16, 25, 29administration interfacelogging in 21Administration page 34, 46, 49alerts, email 46Appearance page 34App

Barracuda Web Filter Release 3.392HTTPS filtering option 41Iindicator lights 43infected clients list 46Infection Activity page 46inline pass-through d