Remerciez-le!

Remerciez @Admin pour avoir partagé cet document gratuitement, de la manière la plus simple, en partageant sur les réseaux sociaux.

1 Barracuda Networks Inc. 3175 S. WInchester Blvd Campbell, CA 95008 http://www

1 Barracuda Networks Inc. 3175 S. WInchester Blvd Campbell, CA 95008 http://www.barracuda.com B a r r a c u d a W e b F i l t e r A d m i n i s t r a t o r ’ s G u i d e V e r s i o n 3 . 3 2 Barracuda Web Filter Administrator’s Guide Copyright Notice Copyright 2004-2008, Barracuda Networks www.barracuda.com v33-080413-01-0413 All rights reserved. Use of this product and this manual is subject to license. Information in this document is subject to change without notice. Trademarks Barracuda Web Filter is a trademark of Barracuda Networks, Inc. All other brand and product names mentioned in this document are registered trademarks or trademarks of their respective holders. Administrator’s Guide 3 Contents Chapter 1 – Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Spyware-blocking techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Content-filtering techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 User and group-based policy control . . . . . . . . . . . . . . . . . . . . . . . 9 Application-blocking techniques. . . . . . . . . . . . . . . . . . . . . . . . . . 9 Energize Updates minimize administration and maximize protection . . . . . . . 9 Deploying the Barracuda Web Filter . . . . . . . . . . . . . . . . . . . . . . . . 11 Inline pass-through (transparent) mode . . . . . . . . . . . . . . . . . . . . . 11 Forward proxy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Chapter 2 – Installation and Configuration . . . . . . . . . . . . 15 Network considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Routers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 External DNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Internal DNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Enterprise class Layer 3 switch, VLANS, VPN concentrators . . . . . . . 16 Firewall DMZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Internal servers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Cache . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 QoS/packet reconfiguration (Quality of Service, packet shapers) . . . . . 17 Mounting and cabling considerations . . . . . . . . . . . . . . . . . . . 17 Installing and configuring the Barracuda Web Filter . . . . . . . . . . . . . . . . 18 Step 1. Verify that you have the necessary equipment . . . . . . . . . . 18 Step 2. Install the Barracuda Web Filter . . . . . . . . . . . . . . . . . . 18 Step 3. Configure the Barracuda Web Filter IP and network settings . . . 19 Step 4. Configure your corporate firewall . . . . . . . . . . . . . . . . . 20 Step 5. Configure the Barracuda Web Filter . . . . . . . . . . . . . . . . 20 Step 6. Update the Barracuda Web Filter firmware . . . . . . . . . . . . 21 Step 7. Verify your subscription status . . . . . . . . . . . . . . . . . . . 22 Step 8. Update the definitions . . . . . . . . . . . . . . . . . . . . . . . 23 Step 9. Integrate the Barracuda Web Filter into your network . . . . . . . 23 Step 10. Test and adjust the Barracuda Web Filter . . . . . . . . . . . . 24 Connecting the Barracuda Web Filter to your network . . . . . . . . . . . . . 24 Advanced installation topics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Inline pass-through with pre-existing proxy deployment . . . . . . . . . . . . 26 Supported pre-existing proxy types . . . . . . . . . . . . . . . . . . . . 27 Connecting inline to your network with a pre-existing proxy server . . . . . . . 28 Chapter 3 – Configuring, Monitoring, and Managing the Barracuda Web Filter . . . . . . . . . . . . . . . . . 31 Configuring the Barracuda Web Filter . . . . . . . . . . . . . . . . . . . . . . . 32 Configuring system IP information . . . . . . . . . . . . . . . . . . . . . . . 32 Barracuda Web Filter Release 3.3 4 : Setting up linked management . . . . . . . . . . . . . . . . . . . . . . . . . 32 Data propagated to the linked systems . . . . . . . . . . . . . . . . . . 33 Switching a system to standby mode . . . . . . . . . . . . . . . . . . . 34 Controlling access to the Web interface. . . . . . . . . . . . . . . . . . . . . 34 Customizing the appearance of the Web interface . . . . . . . . . . . . . . . 34 Changing the language of the Web interface . . . . . . . . . . . . . . . . . . 34 Setting the time zone of the system . . . . . . . . . . . . . . . . . . . . . . . 34 Enabling and disabling virus protection . . . . . . . . . . . . . . . . . . . . . 35 Enabling and disabling Web caching . . . . . . . . . . . . . . . . . . . . . . 35 Setting up a syslog server to centrally monitor system logs . . . . . . . . . . 35 Creating block and accept filters . . . . . . . . . . . . . . . . . . . . . . . . .