Web Gateway 7.1.5 Product Guide - McAfee

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6 Web filtering Media type filtering Download Media Type Blocklist List of media types that are blocked when users attempt to download them from the web. Type — Media Type The list is initially empty. The following table describes the list entries. Table 6-11 Media Type Blocklist Option Definition Media type Media type that is not allowed for downloading from the web Comment Plain-text comment on a media type Add a media type to a media type filter list You can add a media type to a list media type filtering. 1 Go to Policy | Rule Sets. 2 On the rule sets tree, go to a rule set that contains rules for media filtering, for example, the nested Download Media Types rule set of the Media Type Filtering rule set and select it. The rules appear on the settings pane. 3 Select the rule Block types from Media Type Blocklist and click on the list name. The Edit List (MediaType) window opens. 4 Click Edit. And Edit window opens. It displays a list of group folders with media types. 5 Expand the group folder with the media type you want to add, for example, Audio, and select the media type, for example, audio/mp4. Note: To add multiple media types at once, select multiple media types or one or multiple group folders. 6 Click OK. The window closes and the media type appears on the filter list. 7 Click Save Changes. For more information on how to maintain a list, see List maintenance. 206 McAfee Web Gateway 7.1.5 Product Guide
HTML filtering Web filtering HTML filtering 6 The appliance can filter HTML pages and remove embedded objects from them. This section explains HTML filtering and describes the rules, lists and module settings involved in the filtering process. Rules for HTML filtering typically say whether er objects embedded in HTML pages should be removed or kept. They evaluate object types and use also filter lists. They call an opener module to make embedded objects accessible for filtering. The types of objects HTML filtering can remove include the following: • Java applets — Are embedded in HTML pages (unlike the stand-alone Java applications) and run, once their certificates are accepted, with all privileges of the current user • ActiveX controls — Run with all privileges of the user • Scripts — Include JavaScript, JScript, and Visual Basic Script • Media types — Include text, audio, image, streaming, and other media types Rules for HTML filtering To enable HTML filtering on the appliance, a rule set containing appropriate rules must be implemented. This section describes a sample rule set from the rule set library. After the initial setup, an HTML filtering rule set is not implemented on the appliance. You can import the HTML Filtering rule set from the library and modify it according to your requirements or create a rule set of your own. For more information, see Import a rule set and HTML Filtering (rule set). HTML Filtering (rule set) This section describes the rules of a library rule set for HTML Filtering. For general information on understanding and handling rules, see Rules and rule sets. Library rule set — HTML Filtering Criteria — Always Cycles — Requests (and IM), responses, embedded objects The rule set contains a rule and the following two nested rule sets: • Enable HTML Filtering • HTML Filtering The following rule is contained in the rule set in addition to the nested rules sets: Remove Content-Encoding header Always –> Continue — Header.RemoveAll (“Accept-Encoding”) The rule uses an event to remove the content encoding header from a request. This header is not needed because filtering is only applied to the content, which is eventually sent in not encoded format to the user who requested it. The name of the header is specified by the event parameter. Processing continues with the next rule set. McAfee Web Gateway 7.1.5 Product Guide 207
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Product Guide McAfee ® version 7.1
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Contents Preface 9 About this guide
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Contents Standard authentication .
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Contents Create an error handler .
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Preface About this guide This Produ
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Table i-2 Acronyms (continued) Acro
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1 Introduction Contents Comprehensi
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Deployment of the McAfee Web Gatewa
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Operating system Introduction Filte
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Introduction Chapters of this guide
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2 Setup and logon Contents Setting
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Setup and logon Setting up the McAf
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Installing the appliance software S
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2 Review the summary that is displa
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Import a license Setup and logon Lo
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Main elements of the user interface
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Setting up system management tools
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Setup and logon Setting up system m
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3 Proxies and caching Contents Inte
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Explicit proxy mode Proxies and cac
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Table 3-1 WCCP Services list (conti
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Proxies and caching Network modes 3
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Transparent bridge mode Proxies and
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Transparent router mode Proxies and
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Common proxy settings Proxies and c
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Proxies and caching Common proxy se
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8 Make sure the following is config
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Proxies and caching Reverse HTTPS p
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Proxies and caching Providing proxy
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Preventing data leaks Proxies and c
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Web caching Proxies and caching Web
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Bypass lists for web caching Proxie
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Verify the enabling of the web cach
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4 Rules and rule sets Contents Filt
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Rules and rule sets Filtering contr
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Modules for delivering filtering in
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Rules on the user interface On the
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Property of a URL Property — URL.
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About rule sets Rules and rule sets
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Rules and rule sets About rule sets
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Table 4-4 Rule set library Rule set
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The Rule Sets toolbar provides the
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Add name, comment, and enabling Com
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Add as many parameters as needed. A
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3 Select Event. The Add Event windo
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Adding the action 9 Select Action.
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Rules and rule sets Rule configurat
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Add a new rule set You can also cre
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List maintenance Rules and rule set
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Add a list Complete the following p
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Action and engine settings Rules an
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Access restrictions Rules and rule
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5 Filtering users Authentication an
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Authentication and access managemen
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Module for authenticating users Aut
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LDAP Settings specifying the LDAP m
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Novell eDirectory Settings specifyi
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Kerberos Settings specifying the Ke
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Table 5-8 Certificate Authorities l
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Page 155 and 156: Authentication and access managemen
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Page 171 and 172: Virus and malware filtering Web fil
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Page 205: Lists for media type filtering Web
Page 209 and 210: Web filtering HTML filtering 6 Embe
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Page 215 and 216: Global whitelists Web filtering Glo
Page 217 and 218: Web filtering SSL scanning 6 Handle
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Page 223 and 224: Modules for SSL scanning Web filter
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Page 235 and 236: Web filtering Supporting functions
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Database updates Table 7-13 File Ed
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System configuration Database updat
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Configure central management settin
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System configuration Central manage
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Scheduled job settings This section
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System configuration Central manage
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8 Monitoring Contents Monitoring th
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Monitoring Dashboard 8 Overview of
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Charts and Tables tab Monitoring Da
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Table 8-4 Overview of charts and ta
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Logging Monitoring Logging 8 Applia
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Sample logging rule Monitoring Logg
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13 Configure the following for the
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Monitoring Logging 8 4 Go to Policy
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+ Number.ToString (Block.ID) + “
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Create a rule for setting text as t
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Monitoring Logging 8 • In the Con
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Configuring log file settings Monit
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Monitoring Logging 8 Auto Pushing S
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Log handler rule sets Monitoring Lo
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Performance measurement Monitoring
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Monitoring Performance measurement
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Transferring data to an ePO server
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Event monitoring with SNMP Monitori
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Error handling Table 8-7 Trap Sinks
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Rule sets for error handling Monito
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The rule set contains the following
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Monitoring Error handling 8 Handle
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Monitoring Error handling 8 Block o
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9 Troubleshooting Contents Troubles
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Enable the creation of connection t
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List of actions Appendix: Configura
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Table A-2 List of error IDs (contin
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Table A-3 List of events (continued
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Table A-3 List of events (continued
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List of incident IDs Appendix: Conf
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Table A-4 List of incident IDs (con
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Table A-5 List of properties (conti
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Wildcard expressions Appendix: Conf
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Table A-6 List of important special
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Table A-7 List of important special
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Index A access restrictions 117 act
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I ICAP server, see proxies ICQ, see
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SNMP monitoring 303 SSL scanning Ce
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Web Gateway 7.1.5 Product Guide - McAfee

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