Web Gateway 7.1.5 Product Guide - McAfee

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6 Web filtering Supporting functions Next-hop proxy modes When multiple servers are available as next-hop proxies for routing requests, the next-hop proxy module can use two modes to call them: round-robin and fail-over. When routing a request in round-robin mode, the next-hop proxy module calls the server that is next on the list to the one that was called last time. For the next request, this is handled in the same way, so all servers on the list will eventually have been used as next-hop proxies. Figure 6-1 Round-robin mode When routing a request in fail-over mode, the next-hop proxy module calls the first server on the list. If the server fails to respond, the call is repeated until the configured number of retries is reached. Only then is the next server in the list tried. It is called in the same way as the first, and eventually the next server in the list is tried. This is continued until a server responds or all servers in the list were found to be unavailable. Figure 6-2 Fail-over mode 234 McAfee Web Gateway 7.1.5 Product Guide
Web filtering Supporting functions 6 Next-Hop Proxy This section describes a library rule set with a rule that routes internal requests through internal next-hop proxies. For general information on understanding and handling rules, see Rules and rule sets Library rule set — Next-Hop Proxy Criteria — Always Cycle — Requests (and IM) The rule set contains the following rule: Use internal proxy for internal host URL.Destination.IP is in range list Next Hop Proxy IP Range List OR URL.Destination.IP is in list Next Hop Proxy IP List –> Continue — Enable Next Hop Proxy The rule uses the URL.Destination.IP property to check whether an IP address that corresponds to a URL is in one of the ranges specified on a list or is on a list directly. If it is, the rule uses an event to route requests for access to these URLs through internal next-hop proxies. The event settings specify settings that include the next-hop proxy list and the mode for calling proxies. Lists for next-hop proxy routing This section describes the library next-hop proxy lists. When you import the Next Hop Proxy rule set from the library, these lists are also imported. Note: You can find the list on the Lists tab of the Policy top-level menu, which displays lists sorted by their types and names. For general information on how to maintain lists, see List maintenance. Next-Hop Proxy IP List List of IP addresses that are the destinations of requests received on the appliance Type — IP The list is initially empty. The following table describes the list entries. Table 6-22 Next-Hop Proxy IP List Option Definition IP IP address of the destination for a request Comment Plain-text comment on an IP address Next-Hop Proxy IP Range List List of IP address ranges for the destinations of requests received on the appliance Type — IPRange The list is initially empty. The following table describes the list entries. Table 6-23 Next-Hop Proxy IP Range List Option Definition IPRange IP address range for destinations of requests Comment Plain-text comment on an IP address range McAfee Web Gateway 7.1.5 Product Guide 235
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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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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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Page 215 and 216: Global whitelists Web filtering Glo
Page 217 and 218: Web filtering SSL scanning 6 Handle
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Page 265 and 266: Scheduled job settings This section
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Page 269 and 270: 8 Monitoring Contents Monitoring th
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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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