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

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Appendix D: Configuring Dynamic Routing with RIP RIP with Sidewinder G2 using transparent IP addressing If connection is lost between Router_a and SidewinderG2_b 618 hops verses 4 hops), it forwards the connection frame on to Router_a, which forwards the frame to the Sidewinder G2. The Sidewinder G2 IP services receive the frame, and checks its routing table to decide if it knows where this connection request should be sent. Because the external routing table has a route to Bizco’s network, the IP services sends the request up to the Telnet proxy. If there was no route to Bizco’s network, and a default route had not been specified, the Sidewinder G2 IP services would have discarded the packet. The Telnet proxy receives and validates the connection request, then proceeds to issue a new, independent TCP connection request to the Telnet server (on the external network). This new request, which has an originating address of the external Sidewinder G2, gets sent to Router_a and is forwarded on into the Bizco network and so on and so forth. The Bizco Telnet server replies back to the Sidewinder G2, thinking that the Sidewinder G2 is the originator of the session. The Telnet proxy then replies back to the Telnet client, and the session is now in place between the server and the client. If the connection between Router_a and SidewinderG2_b is lost, the following occurs: 1 SidewinderG2_b notices that it is no-longer receiving RIP updates from Router_a and updates its local routing table hop count for that route to 16 (route unreachable), and broadcasts this out on the internal network (this is to notify Router_b). 2 The Telnet client sends another IP frame to Router_a unaware that the route between Router_a-to-SidewinderG2_b has been lost. Router_a looks at its local routing table and discovers there are two routes, one unreachable, the other through Router_d. 3 Because Router_d is on the same network as the client, Router_b sends an ‘ICMP Redirect’ back at the client stating that it can reach the Telnet server network through Router_d. 4 The client updates its local routing table to point that host at Router_d, then re-sends its last frame to Router_d. 5 Router_d receives the frame and forwards it on to Router_c, which forwards it on to SidewinderG2_c. 6 SidewinderG2_c, receives the IP frame for the Telnet server, checks the route, has a route, and sends it up to the internal TCP servers. The Sidewinder G2 TCP services checks the frame and discovers this is not a TCP connection request and that it there is not currently a session with the client. Because of this, TCP services builds a ‘TCP reset’ frame and sends it back to the client. Note: This causes the current Telnet session to be lost. However, when the Telnet client opens another session to the server, that connection request will get sent to SidewinderG2_c, which will go through all the above steps and establish a NEW session with the Telnet server.
RIP with Sidewinder G2 not using transparent IP addressing Figure 250: RIP with the Sidewinder G2 “spoofing” the client’s address Appendix D: Configuring Dynamic Routing with RIP RIP with Sidewinder G2 not using transparent IP addressing So what happened to the sessions between SidewinderG2_b and the client, and SidewinderG2_b and the server? These sessions will time-out according to what has been configured for the Telnet proxy inactivity timer. Currently this defaults to 2700 seconds, or 45 minutes. Unless the Telnet server also has a connection time-out, the session will remain between the two systems until the time-out occurs, at which time the proxy closes both sessions. What will happen when the route between Router_a and SidewinderG2_b becomes available again? The Telnet client sends the frame to Router_d which will send an ‘ICMP Redirect’ back to the client telling it to communicate through Router_b. The client will resend the frame to Router_b, which forwards it to the Sidewinder G2. Again the Sidewinder G2 has received a frame for which it is not in session, and it will send a ‘TCP reset’ back to the client, causing the client to again close the session. As far as the client is concerned the Telnet server has unexpectedly closed the session. And again, if the client opens a new session all will be fine. But remember the sessions are timing out between SidewinderG2_c and the Telnet server. Important: The administrator should change this Telnet idle session timer to something more reasonable such as 10 minutes. The assumption for this discussion is that the Telnet server must be able to identify the Telnet clients IP address. The above configuration would not allow this, the Telnet server will see all sessions from CorpCity network as originating from the Sidewinder G2. In Figure 250 as with Figure 249, in order to pass any traffic through the Sidewinder G2, some proxy or server must be configured and enabled. Bizco Network Telnet server R router_a Internet burb trusted burb SidewinderG2_b router_b CorpCity Network To accomplish the ‘spoofing’, you must configure the Sidewinder G2s generic TCP proxy to listen on port 23, and enable it to spoof the original workstations IP address (refer to the “use_client_address” feature in the /etc/sidewinder/ conf/tcpgsp.conf file). The administrator must also enable the rule list allowing internal to external traffic from the Telnet client to the Telnet Server for the R Internet burb trusted burb SidewinderG2_c R router_c R Telnet client router_d 619
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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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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
Page 603 and 604: Figure 233: System Responses: Respo
Page 605 and 606: Sidewinder G2 SNMP traps Chapter 20
Page 607 and 608: Chapter 20: IPS Attack and System E
Page 609 and 610: A APPENDIX Command Line Reference I
Page 611 and 612: Sidewinder G2 area Commands Area De
Page 621 and 622: About editing Sidewinder G2 files A
Page 623 and 624: Changing file types in the operatio
Page 625 and 626: etc/monthly Appendix A: Command Lin
Page 627 and 628: CRL and certificate retrieval cron
Page 629 and 630: B APPENDIX Setting Up Network Time
Page 631 and 632: Figure 235: Sidewinder G2 as an NTP
Page 633 and 634: Figure 237: NTP conflict: Sidewinde
Page 635 and 636: Using command line: Appendix B: Set
Page 637 and 638: C APPENDIX Configuring Dynamic Rout
Page 639 and 640: Figure 238: Three OSPF protocol pha
Page 641 and 642: Figure 240: Sidewinder G2 within OS
Page 643 and 644: Figure 242: OSPF Properties tab Abo
Page 645 and 646: Configuring the OSPF Area: Interfac
Page 647 and 648: Configuring the OSPF Areas: Network
Page 649 and 650: D APPENDIX Configuring Dynamic Rout
Page 651 and 652: RIP processing on the Sidewinder G2
Page 653: Appendix D: Configuring Dynamic Rou
Page 657 and 658: Appendix D: Configuring Dynamic Rou
Page 659 and 660: Appendix D: Configuring Dynamic Rou
Page 661 and 662: Enabling/ disabling the routed serv
Page 663 and 664: E APPENDIX Setting Up SmartFilter S
Page 665 and 666: 4 Click Evaluate this version. 5 Co
Page 667 and 668: Figure 252: SmartFilter for Web and
Page 669 and 670: Appendix E: Setting Up SmartFilter
Page 671 and 672: F APPENDIX Basic Troubleshooting In
Page 673 and 674: Restoring access to the Admin Conso
Page 675 and 676: Appendix F: Basic Troubleshooting B
Page 677 and 678: Restoring system files Appendix F:
Page 679 and 680: 8 [Conditional] If needed, change p
Page 681 and 682: Appendix F: Basic Troubleshooting R
Page 683 and 684: Adding hardware to an active Sidewi
Page 685 and 686: Recovering when the licensed NIC fa
Page 687 and 688: What to do if the boot process fail
Page 689 and 690: If you forget your administrator pa
Page 691 and 692: Interpreting beep patterns Table 45
Page 693 and 694: Troubleshooting proxy rules Appendi
Page 695 and 696: Appendix F: Basic Troubleshooting T
Page 697 and 698: Understanding FTP and Telnet connec
Page 699 and 700: Active firewall list: 10.10.10.7 St
Page 701 and 702: Appendix F: Basic Troubleshooting T
Page 703 and 704: 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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