Web Gateway 7.1.5 Product Guide - McAfee

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1 Introduction Main components of the McAfee Web Gateway appliance Main components of the McAfee Web Gateway appliance The McAfee Web Gateway appliance uses several subsystems to provide filtering and other functions, based on its operating system. Appliance subsystems The subsystems of the appliance and their modules do the following: • Core subsystem — Provides a proxy module for intercepting web traffic and a rule module for processing the filtering rules that make up your web security policy This subsystem furthermore provides the modules (also known as engines) that do special jobs for the filtering rules and can be configured by you, for example, the Anti-Malware engine, the URL Filter engine, or the Authentication engine A flow manager module ensures efficient cooperation between the modules. • Coordinator subsystem — Stores all configuration data processed on the appliance This subsystem also provides update and central management functions. • Configurator subsystem — Provides the user interface (internal subsystem name is Konfigurator). Figure 1-2 Appliance subsystems and modules 16 McAfee Web Gateway 7.1.5 Product Guide
Operating system Introduction Filtering rules on the McAfee Web Gateway appliance 1 The subsystems of the appliance rely on the functions of its operating system, which is MLOS (McAfee Linux Operating System) version 1.0. The operating system provides functions for executing the actions that the filtering rules trigger, file and network reading and writing, and access control. A configuration daemon (sysconfd daemon) implements changed configuration settings in the operating system. Filtering rules on the McAfee Web Gateway appliance Rules control the filtering process on the appliance. Reviewing these rules lets you understand what the appliance does to ensure web security. You need not set up these rules yourself, a wizard can do this for you, according to your instructions, or a default system of rules is implemented. You can then still modify every detail of the implemented system. It is the job of the filtering rules to look at web objects before users of your network are allowed to access them and also at these users. These rules check the properties of objects and users and if, for example, an object is virus-infected or a user not in an allowed user group, they block access to the object or let the user not complete further activities. Rule sets for filtering A rule usually works with other rules to do its job. For example, a whitelisting rule can work with a few blocking rules to do URL filtering. The whitelisting rule says which URLs are allowed and the blocking rules say which are not. Together, these rules are in a URL filtering rule set. The implemented system of rule sets is displayed on the Rule Sets tab of the user interface. When you review it, you will see rule sets there for URL filtering, virus and malware filtering, media type filtering, and other purposes. When you open a rule set, you will see the individual rules that are contained in it. Even a rule that works on its own, like a global whitelisting rule might do, is embedded in a rule set. Some rule sets have other rule sets nested within them. This way, for example, media type filtering can be split up between a nested rule set that filters media type uploads and another nested rule set that filters the downloads. Lists and modules for filtering Rules are interested in the properties of web objects and users. A blocking rule for URLs needs to know which categories URLs belong to, so it can block, for example, a URL that is in the online-shopping category and prevent the users of your network from accessing it. To get at the information they need, rules rely on: • Filter lists — A list can, for example, contain URLs of web sites for online shopping. When a user requests access to a particular URL, a blocking rule goes through the list to see if that URL is on it. • Special modules — Information on URL categories can be retrieved from the Global Threat Intelligence system. A module on the appliance communicates with this system and tells the blocking rule about its findings. Other modules scan web objects for infections, inspect certificates, check user credentials for authentication, or perform other activities related to web and user filtering. McAfee Web Gateway 7.1.5 Product Guide 17
Page 1 and 2: Product Guide McAfee ® version 7.1
Page 3 and 4: Contents Preface 9 About this guide
Page 5 and 6: Contents Standard authentication .
Page 7 and 8: Contents Create an error handler .
Page 9 and 10: Preface About this guide This Produ
Page 11 and 12: Table i-2 Acronyms (continued) Acro
Page 13 and 14: 1 Introduction Contents Comprehensi
Page 15: Deployment of the McAfee Web Gatewa
Page 19 and 20: Introduction Chapters of this guide
Page 21 and 22: 2 Setup and logon Contents Setting
Page 23 and 24: Setup and logon Setting up the McAf
Page 25 and 26: Installing the appliance software S
Page 27 and 28: 2 Review the summary that is displa
Page 29 and 30: Import a license Setup and logon Lo
Page 31 and 32: Main elements of the user interface
Page 33 and 34: Setting up system management tools
Page 35 and 36: Setup and logon Setting up system m
Page 37 and 38: 3 Proxies and caching Contents Inte
Page 39 and 40: Explicit proxy mode Proxies and cac
Page 41 and 42: Table 3-1 WCCP Services list (conti
Page 43 and 44: Proxies and caching Network modes 3
Page 45 and 46: Transparent bridge mode Proxies and
Page 49 and 50: Transparent router mode Proxies and
Page 53 and 54: Common proxy settings Proxies and c
Page 55 and 56: Proxies and caching Common proxy se
Page 61 and 62: 8 Make sure the following is config
Page 63 and 64: Proxies and caching Reverse HTTPS p
Page 65 and 66: Proxies and caching Reverse HTTPS p
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Proxies and caching Reverse HTTPS p
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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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Administrator accounts Authenticati
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6 Web filtering Contents Filtering
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Virus and malware filtering Web fil
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Web filtering Virus and malware fil
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Whitelists for virus and malware fi
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Module for virus and malware filter
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URL filtering Web filtering URL fil
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Web filtering URL filtering 6 The B
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Modify a filtering rule to block un
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Web filtering URL filtering 6 Add a
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Module for URL filtering Web filter
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Web filtering URL filtering 6 Advan
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Different versions of URL category
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Web filtering Media type filtering
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Web filtering Media type filtering
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Lists for media type filtering Web
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HTML filtering Web filtering HTML f
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Web filtering HTML filtering 6 Embe
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Break; User-Defined.removeOneScript
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Media Type String Blocklist List of
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Global whitelists Web filtering Glo
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Web filtering SSL scanning 6 Handle
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Block untrusted certificate authori
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Web filtering SSL scanning 6 Verify
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Modules for SSL scanning Web filter
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Web filtering SSL scanning 6 SSL Cl
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8 Click OK. The window closes and t
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The rule set contains the following
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Bandwidth throttling Web filtering
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Next-hop proxies Web filtering Supp
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Web filtering Supporting functions
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User messages Web filtering User me
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The following table describes the o
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Table 6-25 Template Editor (continu
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Web filtering User messages 6 Redir
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7 System configuration Contents Con
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System settings System configuratio
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Table 7-4 List of sections on syste
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License system settings System conf
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Network Protection system settings
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System configuration System setting
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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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700-3299A00
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Web Gateway 7.1.5 Product Guide - McAfee

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