Web Gateway 7.1.5 Product Guide - McAfee

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6 Web filtering SSL scanning Certificate Verification This nested rule set handles the CERTVERIFY call in SSL-secured communication. It lets whitelisted certificates skip verification and blocks others according to particular criteria. Nested library rule set — Certificate Verification Criteria — Command.Name equals “CERTVERIFY” Cycle — Requests (and IM) The rule criteria specifies that the rule set applies if a request is received on the appliance that contains the CERTVERIFY command, which is sent to request the verification of a certificate. The rule set contains the following rules: Skip verification for certificates found in Certificate Whitelist SSL.Server.Certificate.HostAndCertificate is in list Certificate Whitelist –> Stop Rule Set The rule lets whitelisted certificates skip verification. Block self-signed certificates SSL.Server.Certificate.SelfSigned equals true –> Block The rule blocks requests with self-signed certificates. The action settings specify a message to the requesting user. Block expired server (7 day tolerance) and expired CA certificates SSL.Server.Certificate.DaysExpired greater than 7 OR SSL.Server.CertificateChain.ContainsExpiredCA equals true –> Block The rule blocks requests with expired server and CA certificates. The action settings specify a message to the requesting user. Block too long certificate chains SSL.Server.CertificateChain.PathLengthExceeded equals true –> Block The rule blocks a certificate chain if it exceeds the path length. The settings in the property specify a list for the module that checks the certificate authorities. The action settings specify a message to the requesting user. Block revoked certificates SSL.Server.CertificateChain.ContainsRevoked equals true –> Block The rule blocks a certificate chain if one of the included certificates has been revoked. The settings in the property specify a list for the module that checks the certificate authorities. The action settings specify a message to the requesting user. Block unknown certificate authorities SSL.Server.CertificateChain.FoundKnownCA equals false –> Block The rule blocks a certificate chain if none of the certificate authoritiies (CAs) issuing the included certificates is a known CA . The settings in the property specify a list for the module that checks the certificate authorities. The action settings specify a message to the requesting user. 218 McAfee Web Gateway 7.1.5 Product Guide
Block untrusted certificate authorities Web filtering SSL scanning 6 SSL.Server.FirstKnownCAIsTrusted equals false –> Block The rule blocks a certificate chain if the first known CA that was found is not trusted. The settings in the property specify a list for the module that checks the certificate authorities. The action settings specify a message to the requesting user. Verify Common Name (proxy setup) This nested rule set verifies set the common name in a certificate. It applies only to requests sent in non-transparent mode. Nested library rule set — Verify Common Name (proxy setup) Criteria — Connection.SSL.TransparentCNHandling equals false Cycle — Requests (and IM) The rule criteria specifies that the rule set applies if a request is received through a connection used in SSL-secured communication and verification of the common name is not performed in transparent mode. The rule set contains the following rules: Allow matching hostname URL.Host equals Certificate.SSL.CN –> Stop Rule Set The rule allows a request if the URL of the requested host is the same as the common name in the certificate. Allow wildcard certificates Certificate.SSL.CN.HasWildcards equals true AND URL.Host matches.Certificate.SSL.CN.ToRegex(Certificate.SSL.CN) –> Stop Rule Set The rule allows requests to hosts sending certificates that have wildcards in their common names matching the URLs of the hosts. To verify that a common name containing wildcards matches a host, this name is converted into a regular expression. Allow alternative common names URL.Host is in list Certificate.SSL.AlternativeCNs –> Stop Rule Set The rule allows requests to hosts with alternative common names in their certificates and the host matches at least one of them. Block incident Always –> Block If any of the rules for allowing matching common names applies, processing of the rule set stops and this rule is not processed. Otherwise, requests are blocked by this rule due to a common name mismatch. The action settings specify a message to the requesting user. McAfee Web Gateway 7.1.5 Product Guide 219
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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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Administrator accounts Authenticati
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Page 169 and 170: 6 Web filtering Contents Filtering
Page 171 and 172: Virus and malware filtering Web fil
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Page 181 and 182: Module for virus and malware filter
Page 187 and 188: URL filtering Web filtering URL fil
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Page 191 and 192: Modify a filtering rule to block un
Page 193 and 194: Web filtering URL filtering 6 Add a
Page 195 and 196: Module for URL filtering Web filter
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Page 201 and 202: Web filtering Media type filtering
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Page 205 and 206: Lists for media type filtering Web
Page 207 and 208: HTML filtering Web filtering HTML f
Page 209 and 210: Web filtering HTML filtering 6 Embe
Page 211 and 212: Break; User-Defined.removeOneScript
Page 213 and 214: Media Type String Blocklist List of
Page 215 and 216: Global whitelists Web filtering Glo
Page 217: Web filtering SSL scanning 6 Handle
Page 221 and 222: Web filtering SSL scanning 6 Verify
Page 223 and 224: Modules for SSL scanning Web filter
Page 225 and 226: Web filtering SSL scanning 6 SSL Cl
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Page 231 and 232: Bandwidth throttling Web filtering
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Page 235 and 236: Web filtering Supporting functions
Page 237 and 238: User messages Web filtering User me
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Page 245 and 246: 7 System configuration Contents Con
Page 247 and 248: System settings System configuratio
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Page 257 and 258: Database updates Table 7-13 File Ed
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Page 265 and 266: Scheduled job settings This section
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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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