Sidewinder G2 6.1.2 Administration Guide - Glossary of Technical ...

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Chapter 4: Understanding Policy Configuration IP Filter rule basics 122 How traffic is filtered if stateful packet inspection is enabled When Sidewinder G2 receives TCP, UDP, and ICMP traffic, it starts by checking an IP Filter session record database to determine if an active session record exists for this traffic. A session record indicates that this traffic is in response to a previous successful match to an allow rule. Session records only exist if the matching rule had stateful packet inspection enabled. Stateful packet inspection is only an option for TCP, UDP, and ICMP IP Filter rules. If an active session record exists, the following occurs: a Perform address rewriting, if required b Perform session processing c Forward packet directly to the correct destination interface without any additional processing If no active session record exists, the following occurs: Sidewinder G2 uses the criteria in Table 19 to check the active IP Filter rules and find a match. The description for how the packet proceeds through the Sidewinder G2 comes after the table. The flowchart in Figure 50 illustrates the complete process. Table 19: Rule matching criteria with stateful packet inspection enabled Protocol Criteria TCP/UDP • source IP address • destination IP address • ports ICMP • packet type (echo, message, timestamp) • source IP address • destination IP address • If a matching allow rule does exist, the following occurs: a Add a session record to the session record database. b Perform Network Address Translation (NAT) if required. c Session processing occurs. d Forward packet directly to the correct destination interface without any additional processing by the Sidewinder G2. • If a matching deny rule exists, the packet is discarded without any further processing.
Chapter 4: Understanding Policy Configuration IP Filter rule basics • If a matching bypass rule exists, the packet is forwarded directly to application-layer processing. Tip: Bypass rules are used to expedite processing of specified traffic by not checking them against all IP Filters rules before sending them to applicationlevel processing. Therefore, position bypass IP Filter rules early in the active rule group. • If no matching IP Filter rule exists, the packet is forwarded to normal Sidewinder G2 application-layer processing. Figure 50: IP Filtering on packets with rules that have stateful packet inspection enabled TCP/UDP/ ICMP in does a session exist? translate as required perform session processing forward message w/o further processing no match “bypass” rule? Sidewinder G2 no match “allow” rule? yes yes yes add a session no match “deny” rule? yes discard packet no perform application-layer processing out 123
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ADMINISTRATION GUIDE
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Copyright © 2006 Secure Computing
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Other Terms and Conditions This pro
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CONTENTS Preface . . . . . . . . .
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Table of Contents Modifying the sta
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Table of Contents Configuring the S
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Table of Contents About mail exchan
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Table of Contents Configuring and d
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Table of Contents CHAPTER 20 IPS At
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Table of Contents APPENDIX F Basic
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PREFACE Who should read this guide
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Online help Preface The Sidewinder
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1 CHAPTER Introduction In this chap
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Figure 2: Protecting multiple netwo
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Chapter 1: Introduction The Type En
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Type Enforced attributes Chapter 1:
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Figure 4: Multiple Type Enforced ar
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Chapter 1: Introduction Additional
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Chapter 1: Introduction Additional
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Network Services Sentry (NSS) Chapt
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2 CHAPTER Administrator’s Overvie
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Admin Console basics Chapter 2: Adm
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Figure 7: Admin Console Login windo
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Figure 9: Main Admin Console menu M
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Admin Console conventions Chapter 2
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Figure 11: Open File window Opening
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Figure 14: Find/Replace window Ente
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Chapter 2: Administrator’s Overvi
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Chapter 2: Administrator’s Overvi
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Figure 15: sshd Server Configuratio
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To access the trusted Telnet server
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3 CHAPTER General System Tasks In t
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Figure 16: System Shutdown window E
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Setting up and maintaining administ
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Figure 18: Administrator Informatio
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Changing passwords Setting the syst
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Using system roles to access type e
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Figure 20: Configuration file backu
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Chapter 3: General System Tasks Con
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Activating the Sidewinder G2 licens
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Chapter 3: General System Tasks Act
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Figure 23: Firewall License: Compan
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Figure 25: Firewall License: Enroll
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Chapter 3: General System Tasks Pro
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Enabling and disabling servers Figu
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Server Name Notes Chapter 3: Genera
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Configuring virus scanning services
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Page 101 and 102: Figure 32: IDS Server window About
Page 103 and 104: Figure 34: Software Management: Sum
Page 105 and 106: Chapter 3: General System Tasks Loa
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Page 109 and 110: Modifying the interface configurati
Page 111 and 112: About the Interface Status window M
Page 113 and 114: Chapter 3: General System Tasks Mod
Page 115 and 116: About the Aliases: New/Modify Netwo
Page 117 and 118: About the Static: Route window Conf
Page 119 and 120: About the SSL certificate fields fo
Page 121 and 122: Enabling/disabling the UPS server C
Page 123 and 124: 4 CHAPTER Understanding Policy Conf
Page 125 and 126: Figure 45: Example of active rules
Page 127 and 128: Chapter 4: Understanding Policy Con
Page 131 and 132: Figure 47: User Groups user group n
Page 133 and 134: Figure 48: Netgroup Subnet objects
Page 135 and 136: Application Defenses Table 11: Samp
Page 141 and 142: Simple proxy rule examples Chapter
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Page 147: IP Filter rule basics Chapter 4: Un
Page 151 and 152: Figure 52: Example network Chapter
Page 153 and 154: Figure 53: Normal NAT IP Filter rul
Page 157 and 158: 5 CHAPTER Creating Rule Elements In
Page 159 and 160: Chapter 5: Creating Rule Elements C
Page 161 and 162: About the Group Information tab Abo
Page 163 and 164: About the User Password tab Chapter
Page 165 and 166: About the User Group Membership win
Page 167 and 168: Figure 60: New Network Object windo
Page 169 and 170: Figure 62: Host network object wind
Page 171 and 172: Figure 63: IP Address network objec
Page 173 and 174: Figure 65: Subnet network object wi
Page 175 and 176: Figure 67: Group Membership window
Page 177 and 178: About the Service Groups window Cha
Page 179 and 180: 6 CHAPTER Configuring Application D
Page 181 and 182: Chapter 6: Configuring Application
Page 187 and 188: About the URL Control tab Chapter 6
Page 189 and 190: Figure 73: Web/Secure Web: HTTP Rep
Page 191 and 192: Figure 74: Web/Secure Web: MIME/Vir
Page 195 and 196: Figure 76: Web/Secure Web: SmartFil
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Chapter 6: Configuring Application
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About the Keyword Search tab Chapte
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Figure 81: Mail (Sendmail) MIME/Vir
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Configuring MIME filtering rules Ch
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Creating Mail (SMTP proxy) Defenses
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Figure 84: Mail (SMTP proxy): Desti
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Creating Citrix Application Defense
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Configuring the FTP Enforcements ta
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Configuring Virus/Spyware filtering
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Creating IIOP Application Defenses
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Configuring the H.323 Filter tab Ch
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About the Service Name (SID): New S
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Creating SOCKS Application Defenses
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Figure 95: SNMP v1: OID Editing win
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Creating Standard Application Defen
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Configuring connection properties C
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Configuring connection ports Chapte
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7 CHAPTER Configuring Network Defen
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Figure 100: Network Defense window
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About the Network Defenses: TCP tab
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Configuring the UDP Network Defense
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Configuring the ICMP Network Defens
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Configuring the ARP Network Defense
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8 CHAPTER Creating Rules and Rule G
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About the Duplicate Rule Name windo
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Chapter 8: Creating Rules and Rule
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Figure 110: Proxy Rule: Authenticat
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Entering information on the Time ta
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Figure 113: IP Filter Rules window
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Figure 114: IP Filter Rules Source/
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Figure 115: IP Filter Time tab Abou
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Chapter 8: Creating Rules and Rule
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Figure 117: Modify Groups window Ch
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Selecting your active policy rules
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Figure 120: IP Filter General Prope
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9 CHAPTER Configuring Proxies In th
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Chapter 9: Configuring Proxies Prox
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Redirected proxy connections Chapte
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Figure 123: Port redirection for in
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Proxy Name Type and Port Descriptio
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Proxy Name Type and Port Descriptio
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Notes on selected proxy configurati
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Notes on using the FTP proxy Chapte
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HTTP/HTTPS considerations Chapter 9
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Figure 124: News server in front of
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About the T.120 proxy Chapter 9: Co
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Chapter 9: Configuring Proxies Note
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Figure 126: Proxies window About th
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Figure 127: ica proxy Advanced tab
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Configuring connection ports Chapte
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10 CHAPTER Setting Up Authenticatio
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Administrator authentication Chapte
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Supported authentication methods Ch
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SafeWord authentication Chapter 10:
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Chapter 10: Setting Up Authenticati
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Users, groups, and authentication C
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Figure 131: SSO Cached Authenticati
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Figure 133: Password Configuration
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Entering information on the RADIUS
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Adding or modifying a SafeWord serv
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Figure 137: SNK Configuration windo
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Entering information on the Windows
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Entering information on the Single
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Setting up authentication for servi
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Setting up authentication for Web s
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11 CHAPTER DNS (Domain Name System)
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About Sidewinder hosted DNS Chapter
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Figure 140: Mail exchanger example
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Advanced configurations Enabling an
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Figure 141: Transparent DNS Configu
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Chapter 11: DNS (Domain Name System
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Entering information on the Forward
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Adding an IP address Figure 146: DN
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About the Zone List window About th
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Figure 147: Master Zone Attributes
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Adding a forward lookup sub-domain
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Figure 148: Master Zone Contents ta
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Adding a new forward lookup entry C
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Table 26: DNS configuration options
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Figure 150: Reconfiguring Sidewinde
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About the Reconfiguring DNS: Sidewi
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DNS message logging Chapter 11: DNS
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12 CHAPTER Electronic Mail In this
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Chapter 12: Electronic Mail Overvie
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Sendmail differences on Sidewinder
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Reconfiguring mail Figure 152: Reco
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Managing sendmail Figure 153: sendm
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Chapter 12: Electronic Mail Editing
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Figure 155: Spamfilter: Whitelist C
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Chapter 12: Electronic Mail Configu
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About the COPY action Chapter 12: E
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Chapter 12: Electronic Mail Configu
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Other sendmail features Creating a
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5 Save the changes you made to file
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Allowing or denying mail on a user
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Chapter 12: Electronic Mail Managin
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13 CHAPTER Setting Up Web Services
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Figure 158: Access to your Web serv
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Figure 161: Option 2: The Web proxy
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Setting up Web access using the HTT
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Using the Web proxy server Figure 1
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Configuring the Web proxy server Fi
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Figure 168: Web Proxy Server window
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Configuring Web Proxy Server HTTP f
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Configuring browsers for the Web pr
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Certain browsers on UNIX Chapter 13
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14 CHAPTER Configuring Virtual Priv
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Protecting your information What ar
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Authenticating IKE VPNs Chapter 14:
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Configuring a VPN client Chapter 14
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Authentication Summary Automatic ke
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Chapter 14: Configuring Virtual Pri
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Understanding virtual burbs Chapter
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Create the virtual burb Configure p
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About the Client Address Pools wind
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Adding or modifying a subnet addres
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Figure 178: Client Address Pools: F
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Adding or modifying a client identi
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Table 28: Supported X.500 Attribute
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Single certificate versus Certifica
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Adding a Certificate Authority Chap
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Figure 180: Remote Identities tab A
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Figure 181: Firewall certificates A
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Figure 182: Remote certificates def
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Selecting a new proxy certificate I
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Figure 185: Import Firewall Certifi
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Exporting both the certificate and
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About the Security Associations win
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Configuring password information on
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Entering Certificate + Certificate
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Entering Manual information on the
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Entering information on the Advance
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Figure 191: VPN between two corpora
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Figure 192: One VPN association per
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Figure 193: One VPN association for
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15 CHAPTER Configuring the SNMP Age
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Figure 195: Community name within a
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Figure 196: MIBs supported by the S
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Defining a community name Defining
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Communication with systems in an ex
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16 CHAPTER One-To-Many Clusters In
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Considerations when using One-To-Ma
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Configuring One- To-Many Chapter 16
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Figure 201: One To Many Management
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Chapter 16: One-To-Many Clusters Co
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Chapter 16: One-To-Many Clusters Co
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Chapter 16: One-To-Many Clusters Un
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17 CHAPTER High Availability In thi
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HA configuration options Chapter 17
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You can configure failover HA in on
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Configuring the heartbeat burbs Cha
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Chapter 17: High Availability Confi
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Removing a secondary/standby from a
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Managing an HA cluster Features tha
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Chapter 17: High Availability Manag
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Changing the multicast address Chap
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About the Local Parameters tab Chap
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Chapter 17: High Availability Manag
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18 CHAPTER Monitoring In this chapt
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About the dashboard Viewing device
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Figure 211: System information: Dis
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Figure 213: Network Traffic: Interf
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Viewing IPS attack and system event
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Figure 218: Attacks by Service wind
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Monitoring Sidewinder G2 status usi
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finger Chapter 18: Monitoring Monit
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dig Chapter 18: Monitoring Monitori
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19 CHAPTER Auditing and Reporting I
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Auditing on the Sidewinder G2 Chapt
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Figure 221: Audit Viewing: View Mod
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Chapter 19: Auditing and Reporting
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Figure 224: Audit Veiwing: Filterin
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Attack Description Application Defe
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Attack Description Chapter 19: Audi
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Example 2: Filtering for services a
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Understanding audit messages Chapte
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Generating reports using the Admin
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Figure 226: Show Report window Tabl
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Report type Description Chapter 19:
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Report type Description Table 37: A
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Generating reports using Sidewinder
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20 CHAPTER IPS Attack and System Ev
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About the IPS Attack Responses wind
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Attack Description Application Defe
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Chapter 20: IPS Attack and System E
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Figure 230: Attack Responses: Setti
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Figure 232: System Responses Modify
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Event Description system critical a
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Figure 233: System Responses: Respo
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Sidewinder G2 SNMP traps Chapter 20
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Chapter 20: IPS Attack and System E
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A APPENDIX Command Line Reference I
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Sidewinder G2 area Commands Area De
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About editing Sidewinder G2 files A
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Changing file types in the operatio
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etc/monthly Appendix A: Command Lin
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CRL and certificate retrieval cron
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B APPENDIX Setting Up Network Time
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Figure 235: Sidewinder G2 as an NTP
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Figure 237: NTP conflict: Sidewinde
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Using command line: Appendix B: Set
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C APPENDIX Configuring Dynamic Rout
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Figure 238: Three OSPF protocol pha
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Figure 240: Sidewinder G2 within OS
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Figure 242: OSPF Properties tab Abo
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Configuring the OSPF Area: Interfac
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Configuring the OSPF Areas: Network
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D APPENDIX Configuring Dynamic Rout
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RIP processing on the Sidewinder G2
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Appendix D: Configuring Dynamic Rou
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RIP with Sidewinder G2 not using tr
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Enabling/ disabling the routed serv
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E APPENDIX Setting Up SmartFilter S
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4 Click Evaluate this version. 5 Co
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Figure 252: SmartFilter for Web and
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Appendix E: Setting Up SmartFilter
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F APPENDIX Basic Troubleshooting In
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Restoring access to the Admin Conso
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Appendix F: Basic Troubleshooting B
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Restoring system files Appendix F:
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8 [Conditional] If needed, change p
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Appendix F: Basic Troubleshooting R
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Adding hardware to an active Sidewi
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Recovering when the licensed NIC fa
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What to do if the boot process fail
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If you forget your administrator pa
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Interpreting beep patterns Table 45
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Troubleshooting proxy rules Appendi
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Appendix F: Basic Troubleshooting T
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Understanding FTP and Telnet connec
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Active firewall list: 10.10.10.7 St
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Appendix F: Basic Troubleshooting T
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Why did NTP stop? Appendix F: Basic
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GLOSSARY ACE/Server A server made b
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Glossary burb A set of one or more
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Glossary external DNS External DNS
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ISAKMP (internet security associati
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ODBC (Open Database Connectivity) G
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eference implementation An IETF ter
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Glossary subnet A network addressin
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INDEX A A record (address record) 3
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B backup backup_file_list 51 comple
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domains access 7 Admn 8 checking 49
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Internet server 317 InterNIC 529 IP
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networks connections report 527 int
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R RADIUS authentication 281, 292 Re
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Sidewinder G2 Enterprise Manager xx
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user passwords 137 users changing p
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The Sidewinder G2 ® Security Appli
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