Sidewinder G2 6.1.1 Administration Guide - Glossary of Technical ...

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10 What is DNS? 10-2 Domain Name System (DNS) The Sidewinder G2 offers two main DNS configurations: Transparent DNS and Sidewinder-hosted DNS. The sections below explain each configuration method. Note: An excellent source of information on DNS is the Internet Software Consortium Web site at www.isc.org. Some background information is also provided in the Sidewinder G2 installation documentation. The book DNS and BIND, by Albitz & Liu (O’Reilly & Associates, Inc.) is also a popular reference. About transparent DNS Transparent DNS represents a simplified DNS configuration. When transparent DNS is configured for the Sidewinder G2, DNS traffic passes transparently through the Sidewinder G2 using a proxy. The Sidewinder G2 uses proxy rules that pass all DNS traffic by proxy to its appropriate burb. DNS requests are then handled by the remote servers. Other machines do not “see” the Sidewinder G2, which means there is minimal disruption to your current DNS configurations throughout your network. Configuring transparent DNS requires specifying the IP address of one or more remote DNS servers. (Alternative server addresses may be used for redundancy.) If a customer is using NAT through the Sidewinder G2, they should also have an additional DNS server on the outside of their network. The external DNS server handles the external zones of your network and its addresses. This configuration allows you to control which addresses are visible to the outside world. Note: Transparent DNS is designed for simple DNS configurations. Complex DNS configurations may require DNS services to be hosted directly on the Sidewinder G2. About Sidewinder hosted DNS Sidewinder hosted DNS represents a more complex DNS configuration that utilizes the integrated Sidewinder G2 DNS server. When configured for hosted services, DNS servers run directly on the Sidewinder G2. This places the DNS server(s) on a hardened operating system, preventing attacks against these servers from penetrating your network.
What is DNS? In a hosted DNS configuration, the Sidewinder G2 requires information about your DNS authority. Generally, there should be only one "master" name server for any fully-qualified domain, (such as nyc.bigbiz.com) also called a “zone”. There may be many "slave" servers, for redundancy and better performance, but they derive their information from the one master for each domain. You can configure Sidewinder hosted DNS to use a single server or split servers as follows: Hosted single server DNS—In a Sidewinder hosted single server configuration, one DNS server is hosted on the Sidewinder G2 and handles all DNS queries. The server is protected by the Sidewinder G2 hardened OS, preventing attacks from penetrating your network. A single server configuration is generally used when you have no concerns for keeping your internal network architecture hidden, such as when your Sidewinder G2 is acting as an “intrawall” between two sets of private addresses. External hosts will need to be reconfigured to point to the Sidewinder G2 servers. Hosted split server DNS—In a Sidewinder hosted split server configuration, two DNS servers are hosted on the Sidewinder G2: one server (the external name server) is bound to the external burb and the other server (the "unbound" name server) is available for use by all internal burbs. Both servers are protected by the Sidewinder G2 hardened OS, which is able to prevent attacks against them from penetrating your network. The security benefit of using a Sidewinder hosted configuration is the ability to hide the DNS entries on the unbound server from those who only have access to the external burb. External hosts will need to be reconfigured to point to the Sidewinder G2 servers. Important: You must use hosted split DNS if you want the Sidewinder G2 to hide your private IP addresses (via Network Address Translation). Note: Secure Computing recommends splitting the Sidewinder G2 DNS servers when using hosted DNS. Domain Name System (DNS) 10-3
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ADMINISTRATION GUIDE
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Copyright © 2005 Secure Computing
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Other Terms and Conditions This pro
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Table of Contents Chapter 1: Introd
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Table of Contents Enabling and disa
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Table of Contents Creating SNMP App
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Table of Contents About Sidewinder
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Table of Contents Configuring the S
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Table of Contents Active connection
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Table of Contents RIP with the Side
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Who should read this guide What is
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Chapter title Description Chapter 1
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Online help Where to find additiona
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C HAPTER 1 Introduction About this
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Figure 1-2. Protecting multiple net
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The Type Enforced environment Table
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Figure 1-3. Example of domain separ
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Additional Sidewinder G2 operating
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Proxy software and access control A
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C HAPTER 2 Administrator’s Overvi
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Figure 2-1. Sidewinder G2 administr
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Figure 2-2. Admin Console Login win
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Figure 2-3. Feature Notification wi
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About the top portion of the Admin
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Admin Console conventions Admin Con
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Figure 2-5. File Editor window Abou
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Figure 2-7. Backup File window Ente
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Remote administration using Secure
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Figure 2-10. sshd Server Configurat
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Administering Sidewinder G2 using T
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C HAPTER 3 General System Tasks Abo
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Figure 3-1. System Shutdown window
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Setting up and maintaining administ
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Figure 3-3. Administrator Informati
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Changing passwords Setting the syst
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Using system roles to access type e
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Configuration file backup and resto
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What is backed up and restored What
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Configuration file backup and resto
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Activating the Sidewinder G2 licens
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From a workstation that has Web acc
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Figure 3-8. Firewall License: Compa
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Figure 3-10. Firewall License: Enro
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Protected host licensing and the Ho
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Figure 3-11. Determining which VPN
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Table 3-3. Sidewinder G2 servers Se
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Configuring the synchronization ser
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Figure 3-14. Scanner: Advanced tab
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Figure 3-15. Scanner: Signature tab
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Configuring the shund server Figure
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Figure 3-18. IDS Configuration: Shu
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Figure 3-20. Software Management: I
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Loading and installing patches 5. C
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Loading and installing patches 3. S
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Modifying the burb configuration 2.
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Modifying the Configuration tab Mod
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About the Aliases: New/ Modify Netw
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Modifying the static route About th
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About the SSL certificate fields fo
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Figure 3-26. UPS Configuration wind
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C HAPTER 4 Understanding Policy Con
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Figure 4-2. Example of active rules
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Policy configuration basics The fol
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Rule elements Network objects—Ne
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Figure 4-4. User Groups user group
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Rule elements If an organization re
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Example of a rule that uses a servi
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Application Defenses You can also c
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Proxy rule basics Table 4-4. Applic
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Proxy rule basics the user request
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Proxy rule basics Table 4-5 summari
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Table 4-7. Proxy rules for sample c
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Table 4-9. Proxy rules for the adva
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Mutually exclusive rules for Transp
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Figure 4-7. IP Filtering on non-TCP
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Figure 4-8. IP Filtering on TCP/UDP
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Setting the IP Filter NAT port rewr
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Figure 4-11. "Source port" NAT IP F
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C HAPTER 5 Creating Rule Elements A
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Creating users and user groups Mod
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About the Group Information tab Abo
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About the User Password tab Creatin
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Figure 5-4. User Group Membership w
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Figure 5-6. New Network Object wind
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Entering domain information Figure
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Figure 5-9. IP Address network obje
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About the Netmap Members window Cre
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Figure 5-12. Network Object: netgro
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Creating service groups Figure 5-14
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C HAPTER 6 Configuring Application
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Viewing Application Defense informa
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Figure 6-2. Application Defense: We
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Creating Web or Secure Web Applicat
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Figure 6-5. Web/Secure Web: HTTP Re
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Figure 6-6. Web/Secure Web: MIME/Vi
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Creating Web Cache Application Defe
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Creating Mail Application Defenses
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Figure 6-10. Mail Size tab Creating
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Creating Mail Application Defenses
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Figure 6-12. Mail MIME/ Virus tab A
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Configuring MIME filtering rules Cr
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Creating Citrix Application Defense
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Creating FTP Application Defenses F
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Figure 6-16. Application Defenses:
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Creating Multimedia Application Def
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Figure 6-18. Application Defenses:
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Creating SOCKS Application Defenses
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Creating SNMP Application Defenses
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Figure 6-22. Example of OID numberi
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Figure 6-24. Application Defense Gr
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Configuring connection properties d
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C HAPTER 7 Creating Rules and Group
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Viewing rules and rule groups You c
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Entering information on the Proxy R
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Creating proxy rules 5. [Optional]
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Figure 7-4. Proxy Rule: Time tab Cr
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Figure 7-5. Proxy Rule: Application
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Figure 7-6. IP Filter Rules window
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About the IP Filter Source/ Dest ta
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Figure 7-8. IP Filter Time tab Crea
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Creating and managing rule groups C
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Figure 7-10. Modify Groups window A
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Figure 7-11. Active Rules window Ab
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Figure 7-13. IP Filter General Prop
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C HAPTER 8 Configuring Proxies Abou
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Proxy basics Important: Network att
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Redirected proxy connections Config
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Figure 8-2. Address redirection for
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Standard Sidewinder G2 proxies Prox
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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 Notes
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Sun RPC proxy considerations Notes
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Figure 8-5. News server behind the
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Page 295 and 296: Proxy Name—Displays the name of t
Page 297 and 298: Figure 8-7. ica proxy Advanced tab
Page 299 and 300: Configuring connection ports Settin
Page 301 and 302: C HAPTER 9 Setting Up Authenticatio
Page 303 and 304: Administrator authentication Authen
Page 305 and 306: Supported authentication methods Su
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Page 309 and 310: Authentication process overview Aut
Page 311 and 312: Users, groups, and authentication C
Page 313 and 314: Configuring authentication services
Page 315 and 316: Figure 9-1. SSO Cached Authenticati
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Page 319 and 320: Figure 9-4. Password Configuration
Page 321 and 322: Adding or modifying a RADIUS server
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Page 325 and 326: Figure 9-8. SNK Configuration windo
Page 327 and 328: Adding or modifying a Windows domai
Page 329 and 330: Configuring SSO b. In the Edit Logi
Page 331 and 332: Setting up authentication for servi
Page 333 and 334: Setting up authentication for admin
Page 335 and 336: Allowing users to change their pass
Page 337 and 338: . Select Manual Proxy Configuration
Page 339: C HAPTER 10 Domain Name System (DNS
Page 343 and 344: Figure 10-1. Mail exchanger example
Page 345 and 346: Enabling and disabling your DNS ser
Page 347 and 348: Managing your current DNS configura
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Page 351 and 352: Figure 10-6. DNS Server Configurati
Page 353 and 354: Entering information on the Advance
Page 355 and 356: Figure 10-7. DNS Zones window Confi
Page 357 and 358: About the Zone List window About th
Page 359 and 360: Figure 10-8. Master Zone Attributes
Page 361 and 362: Adding a forward lookup sub-domain
Page 363 and 364: Figure 10-9. Master Zone Contents t
Page 365 and 366: Adding a new forward lookup entry C
Page 367 and 368: Reconfiguring DNS Reconfiguring DNS
Page 369 and 370: Figure 10-10. Reconfigure transpare
Page 371 and 372: About the Reconfiguring DNS: Sidewi
Page 373 and 374: Manually editing DNS configuration
Page 375 and 376: C HAPTER 11 Electronic Mail About t
Page 377 and 378: Overview of e-mail on Sidewinder G2
Page 379 and 380: Sendmail differences on Sidewinder
Page 381 and 382: Managing sendmail Managing sendmail
Page 383 and 384: Figure 11-2. Reconfigure Mail windo
Page 385 and 386: Figure 11-3. Sidewinder G2 mailerta
Page 387 and 388: Configuring advanced antispam optio
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About the COPY action Configuring a
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Configuring advanced anti-spam opti
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Redirecting mail to a different des
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Other sendmail features You can con
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Figure 11-5. Type of relayed messag
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Managing mail queues Managing mail
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C HAPTER 12 Setting Up Web Services
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Figure 12-3. Access to the internal
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Figure 12-5. Option 2: The Web prox
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Figure 12-7. Standard (transparent)
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Using the HTTP proxy 4. Create an H
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Using the Web proxy server Caching
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Figure 12-10. Web proxy server wind
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Figure 12-12. Web Proxy Server wind
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Configuring Web Proxy Server HTTP f
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Configuring browsers for the Web pr
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Internet Explorer 5.x/6.x Configuri
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1 C HAPTER 13 Configuring Virtual P
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Protecting your information What ar
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Sidewinder G2 VPN overview To preve
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Configuring hardware acceleration f
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Sidewinder G2 VPN overview Implemen
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Configuring the ISAKMP server Figur
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Configuring the Certificate server
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Understanding virtual burbs Underst
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Understanding virtual burbs You can
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Figure 13-5. Client Address Pools A
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Figure 13-6. Client Address Pools:
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Adding or modifying a client identi
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Configuring Certificate Management
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Single certificate versus Certifica
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About the Certificate Authorities t
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Figure 13-8. Remote Identities tab
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Figure 13-9. Firewall certificates
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Figure 13-11. SSL Certificates tab
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Figure 13-3. Load Certificate for P
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Figure 13-13. Import Remote Certifi
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Figure 13-14. Export Firewall Certi
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Configuring VPN Security Associatio
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Figure 13-16. Security Associations
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Configuring password information on
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Entering Certificate + Certificate
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Entering Single Certificate informa
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Example VPN Scenarios Example VPN S
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Example VPN Scenarios How it is don
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Example VPN Scenarios All clients
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Example VPN Scenarios c. Click New.
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The assumptions This VPN scenario a
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Example VPN Scenarios 2. In the Adm
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Example VPN Scenarios a. On the Cer
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C HAPTER 14 Configuring the SNMP Ag
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Figure 14-2. Community name within
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SNMP and Sidewinder G2 IPSEC_FAILU
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Figure 14-3. MIBs supported by the
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Defining a community name Setting u
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Communication with systems in an ex
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C HAPTER 15 One-To-Many Clusters Ab
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Overview DNS services must be conf
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Figure 15-2. Sample network configu
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Configuring One-To-Many b. In the P
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Configuring One-To-Many 3. In the R
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About the Modify Primary Address wi
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Understanding the One-To-Many tree
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Understanding the One-To-Many tree
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C HAPTER 16 High Availability About
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HA configuration options HA configu
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You can configure failover HA in on
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Configuring HA — DNS configuratio
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Configuring HA 8. Select the HA con
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Configuring HA Cluster ID—Select
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Joining a Sidewinder G2 to an exist
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Configuring HA 8. Click Next. The S
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Removing the primary from an HA clu
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Figure 16-3. Special HA and Interfa
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About the Common Parameters tab Man
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Changing the multicast address Mana
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Figure 16-2. Local Parameters tab A
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Managing an HA cluster Scheduling a
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Connecting directly to a secondary/
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C HAPTER 17 Alarm Events and Respon
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Table 17-1. Alarm event column desc
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Filter Name Description Configuring
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Configuring alarm events and event
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Figure 17-3. Event Response tab Abo
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Configuring alarm events and event
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Example alarm event scenario Exampl
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Sample Strikeback results Sample St
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Ignoring network probe attempts Ign
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Checking system status Checking sys
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Rlg0 7418 p2 IW+ 0:01.30.u (tcsh) t
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Network interfaces Checking network
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Checking network status ; Dig 2.1
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C HAPTER 18 Monitoring, Auditing, a
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Monitoring Sidewinder G2 status Fig
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Auditing on the Sidewinder G2 Audit
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Figure 18-3. Audit Viewing: View Mo
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Figure 18-4. Snapshot Audit Data wi
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Figure 18-5. Export Audit Data wind
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Figure 18-6. Audit Filtering tab Ab
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Filter Type Description Auditing on
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Example 2: Filtering for services a
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Field Description src_burb Specify
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Logging application messages using
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Generating and viewing reports usin
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Figure 18-7. Firewall Reports windo
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Report Type Description Generating
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Report Type Description Generating
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Using third party reporting tools U
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Using third party reporting tools 3
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A A PPENDIX A Command Line Referenc
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Sidewinder G2 area Commands Area De
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Working with files on the Sidewinde
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Changing a file’s type (chtype) W
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Understanding automatic (cron) jobs
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Understanding automatic (cron) jobs
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A A PPENDIX B Setting Up Network Ti
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Figure B-2. Sidewinder G2 as an NTP
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Figure B-4. NTP conflict: Sidewinde
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Configuring NTP on a Sidewinder G2
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A A PPENDIX C Configuring Dynamic R
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Overview All OSPF routers on a netw
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Figure C-3. Sidewinder G2 within OS
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Figure C-5. OSPF Properties tab Abo
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Figure C-6. OSPF Area tab Setting u
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Authentication Information window F
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Configuring "passive" OSPF Other im
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A A PPENDIX D Configuring Dynamic R
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RIP processing on the Sidewinder G2
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RIP with the Sidewinder G2 using tr
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If connection is lost between Route
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Figure D-4. RIP with the Sidewinder
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RIP with the Sidewinder G2 NOT usin
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Configuring RIP on the Sidewinder G
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Enabling/ disabling the routed serv
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A A PPENDIX E Setting Up SmartFilte
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Subscribing to the SmartFilter Cont
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Figure E-1. SmartFilter window: Gen
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Figure E-2. SmartFilter Advanced ta
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Editing the SmartFilter files Table
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Table E-2. Category Codes Editing t
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A A PPENDIX F Basic Troubleshooting
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Restoring access to the Admin Conso
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Backing up system files The Sidewin
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Performing an incremental backup Ba
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Table F-2. Sidewinder G2 restore sc
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Restoring system files Performing a
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Table F-3. Restore Script Commands
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To add hardware, follow these steps
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Re-imaging your Sidewinder G2 Syste
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If you forget your administrator pa
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Interpreting beep patterns Interpre
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What you hear What it means What yo
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Troubleshooting proxy rules To dete
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Starting the rule monitoring tool (
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Troubleshooting High Availability T
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Troubleshooting High Availability N
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Troubleshooting High Availability N
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Why did NTP stop? Troubleshooting N
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R EFERENCE Glossary ACE/Server A se
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Glossary BSD/OS The operation syste
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Glossary event response A response
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Glossary internal DNS Manages DNS i
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Glossary network-layer proxy Also k
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Glossary proxy A software agent tha
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Glossary SecureOS The UNIX-based op
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URL (universal resource locator) Gl
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A R EFERENCE Index A record (addres
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ackup_file_list 3-15 complete (full
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checking 3-12 creator A-12 current
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overview 1-12 IP sniffing 1-2 IP sp
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NNTP 8-19 nntp proxy 8-11 non-trans
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to operational kernel command 3-4 r
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smartfilter.site file E-9 SMTP 11-2
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certificate authority 13-27 certifi
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The Sidewinder G2 ® Security Appli
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