Symantecâ¢ Security Gateways Reference Guide - Sawmill

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8 ContentsChapter 9Chapter 10Appendix APreventing attacksAntivirus (appliance only) ......................................................................................................................................113Understanding antivirus ................................................................................................................................113Virus detection .................................................................................................................................................114Antivirus scanning ..........................................................................................................................................115Client comforting .............................................................................................................................................116Container policy ...............................................................................................................................................116Intrusion detection and prevention (appliance only) ........................................................................................116State machines .................................................................................................................................................117Signature engine ..............................................................................................................................................117Global gating ....................................................................................................................................................117Logical network interfaces .....................................................................................................................................118Allow multicast (UDP-based) traffic .............................................................................................................118SYN flood protection .......................................................................................................................................118Enable port scan detection .............................................................................................................................119Enable spoof protection ..................................................................................................................................120Provide recursion and expose private DNS information ...........................................................................120Suppress reset and ICMP error messages ....................................................................................................120Address transforms .................................................................................................................................................120Understanding address transforms ..............................................................................................................121Address transparency .....................................................................................................................................121Redirected services ..........................................................................................................................................124Network address translation .........................................................................................................................125Anti-spam measures ...............................................................................................................................................125Ensuring availabilityLimitations of non-clustered solutions ................................................................................................................127Single-machine drawbacks ............................................................................................................................127Multi-machine concerns .................................................................................................................................128Symantec’s clustered approach .............................................................................................................................128Cluster components ................................................................................................................................................128Synchawk daemon ...........................................................................................................................................128Bullfrog daemon ...............................................................................................................................................129Virtual IP addresses ........................................................................................................................................129Incident node ....................................................................................................................................................129Authoritative node ..........................................................................................................................................130Heartbeat network ...........................................................................................................................................130Stateful failover .......................................................................................................................................................130Load balancing .........................................................................................................................................................131Cluster administration ............................................................................................................................................131Creating a new cluster and adding nodes ....................................................................................................131Deleting nodes from a cluster ........................................................................................................................132Log messagesAbout log messages .................................................................................................................................................133Informational messages (100-199) .......................................................................................................................133Notice messages (200-299) .....................................................................................................................................158Warning messages (300-399) .................................................................................................................................176Error messages (400-499) .......................................................................................................................................229Alert messages (500-599) .......................................................................................................................................256Critical messages (600-699) ...................................................................................................................................260Emergency messages (700-799) ............................................................................................................................269
Contents9Appendix BIDS eventsAbout IDS/IPS events and descriptions ...............................................................................................................273Viewing alerts ...................................................................................................................................................274Denial-of-Service .....................................................................................................................................................296Intrusion attempts ...................................................................................................................................................302Operational events ..................................................................................................................................................353Probes ........................................................................................................................................................................354Signatures .................................................................................................................................................................358Suspicious activity ...................................................................................................................................................364
Page 1 and 2: Symantec Security GatewaysReference
Page 3: Licensing and registrationContactin
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68 Controlling service accessFilter
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86 Controlling user accessTime Peri
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88 Understanding VPN tunnelsTunnels
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90 Understanding VPN tunnelsTunnels
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92 Understanding VPN tunnelsIPsec s
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100 Understanding VPN tunnelsGlobal
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114 Preventing attacksAntivirus (ap
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128 Ensuring availabilitySymantec
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270 Log messagesEmergency messages
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272 Log messagesEmergency messages
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274 IDS eventsAbout IDS/IPS events
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296 IDS eventsDenial-of-ServiceTabl
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302 IDS eventsIntrusion attemptsUnk
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306 IDS eventsIntrusion attemptsDNS
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312 IDS eventsIntrusion attemptsFTP
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354 IDS eventsProbesSensor Record F
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358 IDS eventsSignaturesSMTP Probin
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362 IDS eventsSignaturesAffected: A
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364 IDS eventsSuspicious activitySu
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508 IDS eventsSuspicious activity
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510 IndexIP address spoofing 21Man-
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512 IndexHH.323alias report 105prox
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514 IndexRTSP 57service parameters
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516 Index
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Symantecâ¢ Security Gateways Reference Guide - Sawmill