Web Gateway 7.1.5 Product Guide - McAfee

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3 Proxies and caching Helix proxy configuration Helix proxy configuration The Helix proxy is a third-party proxy for handling real-time streaming data. It is preinstalled on the McAfee Web Gateway appliance. This section tells you how to use this proxy on the appliance. The Helix proxy is initially not accessed from the user interface of the appliance, but using a command line interface, which is, for example, provided by your administration system. Later on, you can administer the proxy on its own user interface. Complete the following procedure to set up the Helix proxy for use on the appliance: 1 On the command line interface, enter the activation command, for example, as follows: service helix-proxy activate You are asked to enter a user name and password for the initial administrator account. 2 Enter both. The Helix proxy is started. Note: After the start, you can find configuration files for the proxy in the /opt/helix-proxy folder on the appliance and modify them manually as needed. 3 Connect to the user interface of the proxy: http://:21774/admin/index.html The user interface appears and displays a logon window. 4 Enter the user name and password from step 2. After a successful logon, the user interface of the proxy is available. 5 Configure your real-player application to use the appliance as a proxy, for example, as follows: a Start the real player. b On its user interface, go to the proxy settings. c In the appropriate input field, for example, the RTSP (Real-Time Streaming Protocol) field, enter the IP address of the appliance with 554 as the port number. For more information, refer to the user documentation of the Helix proxy. 72 McAfee Web Gateway 7.1.5 Product Guide
Preventing data leaks Proxies and caching Preventing data leaks 3 When you are running the appliance together with a DLP (Data Leakage Prevention) solution that uses an ICAP server for the filtering process, you can implement a rule set to ensure the smooth flow of data between the appliance and the ICAP server. This section describes the rule set and the settings that are implemented with it. The DLP solution that you can run together with the appliance is named nDLP. Its purpose is to filter data that users want to upload from your network to the web in order to prevent data leaks. An ICAP server is used by the solution for the filtering process. The data flow is as follows: • Data sent from the client systems of your users is forwarded to the appliance. • The appliance provides an ICAP client that sends REQMOD requests with the user data to the ICAP server that is part of the DLP solution. • The requests are filtered on the server by modifying them according to the ICAP protocol and passed on to the web servers that are the destinations of the requests. After importing the Data Leakage Prevention rule set from the rule set library, rules are executed on the appliance to handle the sending of requests to the ICAP server. According to these rules, a request is not forwarded if: • The body of the request contains no data and the request does not include URL parameters. • The body of the request exceeds a given size (default: 50 MB). Together with the rule set, settings are imported that you need to configure. These include a list of the ICAP servers that the appliance can forward requests to. You can also configure the ICAP client on the appliance not to open more connections for sending requests than a particular ICAP server can handle at the same time. For more information, see Import a rule set and Data Leakage Prevention. Data Leakage Prevention This section describes the rules in the Data Leakage Prevention library rule set. For general information on understanding and handling rules, see Rules and rule sets. Library rule set — Data Leakage Prevention Criteria — URL.Host does not equal “ ” Cycles — Requests (and IM) and embedded objects The rule set criteria specifies that the rule set applies when a host name can be found for a URL that is sent in a request to the appliance. The rule set contains the following rules: Skip requests that do not carry information Body.Size equals 0 AND ListOfString.IsEmpty(URL.Parameters) equals true –> Stop Rule Set The rule uses the Body.Size property to check whether a request has a body that is empty. It also uses the ListOfString.IsEmpty property to check whether a request has URL parameters. If one of the two parts of this criteria is matched, processing of the rule set stops and the request is not forwarded to the ICAP server. McAfee Web Gateway 7.1.5 Product Guide 73
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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
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 71: Proxies and caching Providing proxy
Page 75 and 76: Web caching Proxies and caching Web
Page 77 and 78: Bypass lists for web caching Proxie
Page 79 and 80: Verify the enabling of the web cach
Page 81 and 82: 4 Rules and rule sets Contents Filt
Page 83 and 84: Rules and rule sets Filtering contr
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Page 89 and 90: Property of a URL Property — URL.
Page 91 and 92: About rule sets Rules and rule sets
Page 93 and 94: Rules and rule sets About rule sets
Page 95 and 96: Table 4-4 Rule set library Rule set
Page 97 and 98: The Rule Sets toolbar provides the
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Page 101 and 102: Add as many parameters as needed. A
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Page 105 and 106: Adding the action 9 Select Action.
Page 107 and 108: Rules and rule sets Rule configurat
Page 109 and 110: Add a new rule set You can also cre
Page 111 and 112: List maintenance Rules and rule set
Page 113 and 114: Add a list Complete the following p
Page 115 and 116: Action and engine settings Rules an
Page 117 and 118: Access restrictions Rules and rule
Page 119 and 120: 5 Filtering users Authentication an
Page 121 and 122: Authentication and access managemen
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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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