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

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Chapter 17: High Availability HA configuration options 490 In a load sharing HA configuration, the primary is assigned the cluster address for the heartbeat burb as an alias, allowing it to communicate with the secondary. When the secondary or standby is brought online, it activates its interface IP addresses. The primary will then begin to “multicast” a heartbeat message. The heartbeat uses IPSec authentication (AH) to ensure that the messages are correct. The secondary “listens” for this heartbeat and sends an acknowledgement to the primary. If one of the Sidewinder G2s become unavailable (that is, a heartbeat message or acknowledgement is not received by a Sidewinder G2 for the specified amount of time), the remaining Sidewinder G2 takes over and assumes responsibility for processing all traffic. If one of the Sidewinder G2s unexpectedly becomes unavailable and the remaining Sidewinder G2 takes over processing all traffic, any active proxy sessions and non-stateful IP filter sessions that were assigned to the unavailable Sidewinder G2 will be lost. IP Filter sessions that are configured for stateful session failover will not be lost. If you know in advance that a Sidewinder G2 will need to be shut down, you can reduce the number of lost connections by scheduling the shutdown (rather than shutting down immediately). When a shutdown is scheduled for a later time, a soft shutdown will be performed to reduce the number of sessions that are lost. For information on soft shutdown, see “Scheduling a soft shutdown for an HA cluster Sidewinder G2” on page 510. Certain connections in a load sharing HA cluster will be assigned to the primary. For example, connections that are used for Sidewinder G2 management purposes (Admin Console, telnet, SSH) that are addressed to the shared cluster address will be assigned to the primary. In the event that the primary becomes unavailable, new connections will be assigned to the new primary, and existing connections will remain in tact. SNMP connections that are addressed to the shared address will also be assigned to the primary. Connections that are specifically addressed to an individual Sidewinder G2 address, will be assigned to the specified Sidewinder G2. Failover HA Failover HA consists of one Sidewinder G2 (the primary) actively processing traffic with the standby acting as a hot backup. When a standby Sidewinder G2 is registered to an HA cluster, synchronized areas will be overwritten by the HA cluster configuration. (To determine which areas are synchronized, see “Managing an HA cluster” on page 503.) Once registered, the standby monitors the primary through an Ethernet-based “heartbeat” mechanism that functions between Sidewinder G2s. If the standby determines that the primary is unavailable, the standby takes over and assumes the role of the primary. When a standby takes over networking functions, any active proxy sessions through the primary are lost. IP Filter sessions that are configured for stateful session failover will not be lost.
You can configure failover HA in one of two ways: Chapter 17: High Availability HA configuration options • primary-standby—In a primary-standby configuration, if the primary becomes unavailable, the standby takes over as the acting primary only until the primary becomes available again. (This option is generally used if you have Sidewinder G2s that do not share the same hardware configuration.) • peer-to-peer— In a peer-to-peer configuration, both Sidewinder G2s are configured as standbys with the same takeover time setting. This allows whichever Sidewinder G2 boots up first to act as the primary. If the primary becomes unavailable, the peer Sidewinder G2 (acting as the standby) will take over as the primary and will remain as the acting primary until it becomes unavailable, at which time the peer will again take over as the acting primary. This is the recommended failover HA configuration. However, to configure peer-to-peer HA, both Sidewinder G2s must have similar hardware configurations. When the primary is brought online, it activates both the cluster and interface IP addresses. (Remember, you must inform all users that the cluster address is the Sidewinder G2 address, so all traffic still passes through the primary.) When the secondary or standby is brought online, it activates its interface IP addresses. The primary will then begin to “multicast” a heartbeat message. The heartbeat uses IPSec authentication (AH) to ensure that the messages are correct. The secondary or standby “listens” for this heartbeat. Suppose the primary is accidentally powered off for a period of time. When the standby does not receive a heartbeat signal for a number of seconds (based on the takeover setting of the standby), it sets the cluster common IP addresses on its interfaces. In the process, the standby clears its address resolution protocol (ARP) cache and attempts to generate a “gratuitous ARP.” Most systems will immediately determine that the standby is now responsible for the addresses by which the primary is known, and new connections will be established through the new acting primary. Note: Unfortunately, there may be a number of reasons why the gratuitous ARP is not received: a remote system may not recognize the message, the message may be blocked by certain switches, it may fail due to timing issues, etc. Often this can be resolved by flushing the ARP caches in the remote system. Many of these remote systems have ways to shorten the time that entries stay in the ARP cache; these should be set to time periods in the three to five minute range. If you configured a primary-standby configuration, when the Sidewinder G2 that is configured as the primary is powered on or reactivated, it will begin sending a heartbeat message. When the standby (temporarily acting as the primary) receives the heartbeat message, it immediately drops the cluster common IP addresses so the primary can again assume responsibility. Established connections through the standby will continue to run for a period of time, but eventually all traffic will again pass through the primary. (In a peer-to- 491
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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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Figure 32: IDS Server window About
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Figure 34: Software Management: Sum
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Chapter 3: General System Tasks Loa
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Chapter 3: General System Tasks Loa
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Modifying the interface configurati
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About the Interface Status window M
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Chapter 3: General System Tasks Mod
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About the Aliases: New/Modify Netwo
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About the Static: Route window Conf
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About the SSL certificate fields fo
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Enabling/disabling the UPS server C
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4 CHAPTER Understanding Policy Conf
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Figure 45: Example of active rules
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Chapter 4: Understanding Policy Con
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Figure 47: User Groups user group n
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Figure 48: Netgroup Subnet objects
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Application Defenses Table 11: Samp
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Simple proxy rule examples Chapter
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Table 17: Proxy rules for the advan
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IP Filter rule basics Chapter 4: Un
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Figure 52: Example network Chapter
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Figure 53: Normal NAT IP Filter rul
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5 CHAPTER Creating Rule Elements In
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Chapter 5: Creating Rule Elements C
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About the Group Information tab Abo
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About the User Password tab Chapter
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About the User Group Membership win
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Figure 60: New Network Object windo
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Figure 62: Host network object wind
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Figure 63: IP Address network objec
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Figure 65: Subnet network object wi
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Figure 67: Group Membership window
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About the Service Groups window Cha
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6 CHAPTER Configuring Application D
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Chapter 6: Configuring Application
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About the URL Control tab Chapter 6
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Figure 73: Web/Secure Web: HTTP Rep
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Figure 74: Web/Secure Web: MIME/Vir
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Figure 76: Web/Secure Web: SmartFil
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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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Page 501 and 502: Considerations when using One-To-Ma
Page 503 and 504: Configuring One- To-Many Chapter 16
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Page 515: HA configuration options Chapter 17
Page 519 and 520: Configuring the heartbeat burbs Cha
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Page 529 and 530: Managing an HA cluster Features tha
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Page 533 and 534: Changing the multicast address Chap
Page 535 and 536: About the Local Parameters tab Chap
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Page 539 and 540: 18 CHAPTER Monitoring In this chapt
Page 541 and 542: About the dashboard Viewing device
Page 543 and 544: Figure 211: System information: Dis
Page 545 and 546: Figure 213: Network Traffic: Interf
Page 547 and 548: Viewing IPS attack and system event
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Page 551 and 552: Monitoring Sidewinder G2 status usi
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Page 559 and 560: Auditing on the Sidewinder G2 Chapt
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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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Chapter 19: Auditing and Reporting
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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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Chapter 19: Auditing and Reporting
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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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