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SnapGear 2.0.1 IPSec Setup, Set up the Branch Office, Enabling IPSec, Virtual Private Networking

Models: 2.0.1

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IPSec Setup

CyberGuard SG appliance to CyberGuard SG appliance

There are many possible configurations in creating an IPSec tunnel. The most common and simplest will be described in this section. Additional options will also be explained throughout this example, should it become necessary to configure the tunnel with those settings. For most applications to connect two offices together, a network similar to the following will be used.

Figure 9-12

To combine the Headquarters and Branch Office networks together, an IPSec tunnel must be configured on both CyberGuard SG appliances.

Set up the Branch Office

Enabling IPSec

Click the IPSec link on the left side of the Web Management Console web administration pages. A window similar to the following will be displayed.

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Virtual Private Networking

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SnapGear 2.0.1 IPSec Setup, Set up the Branch Office, CyberGuard SG appliance to CyberGuard SG appliance, Enabling IPSec

Contents

Revision June 7 Contents Firewall 104170 159169 177Introduction IntroductionCyberGuard SG Gateway Appliances CyberGuard SG PCI Appliances Bridged mode Secure by defaultText like this highlights important issues Document ConventionsSG300 model includes two blue straight through UTP cables Your CyberGuard SG Gateway ApplianceFront panel LEDs Virtual Private Networking is enabled Rear panelLAN link features CyberGuard SG Gateway Appliance FeaturesInternet link features DMZ link features SG570, SG575 onlyYour CyberGuard SG PCI Appliance LEDsEnvironmental features CyberGuard SG PCI Appliance FeaturesNetwork link features Getting Started 192.168.0.1 255.255.255.0Page Right click on Local Area Connection and select Properties Set up the Password and LAN Connection Settings 192.168.0.100Root Getting Started Getting Started Analog modem Set up Internet Connection SettingsCable modem DSL modemSet up the PCs on your LAN to Access the Internet LAN with a Dhcp server LAN with no Dhcp serverTo manually set up each Windows PC on your network Select Dhcp Server from the Networking menu Getting Started Install the Network Driver on your PC Set up your PC to Connect to the Web Management ConsoleSelect Internet Protocol TCP/IP and click Properties Select Use the following DNS server addresses and enterSet up the Password and Network Connection Settings Network Setup Connections page will display Click Apply and Reboot Ensure Dhcp assigned is uncheckedGetting Started Click Apply and Reboot Getting Started Page Network Connections Network ConnectionsConnections LAN BridgingInternet Cable Internet Connection MethodsPhysically connect modem device Direct Internet Bridged Internet Dialout Internet COM/ModemFailover Direct/Cable/ADSL Internet Optional ISP. The Password and Confirm Password fields mustField Description Bridged DMZ Dialin accessDirect DMZ Bridged LAN Services on the DMZ NetworkDirect LAN DMZ as a second Internet connectionInternet Failover DMZ as a backup/failover Internet connectionLoad Balancing Enable the primary connection for failover Set up a secondary backup Internet connectionNetwork Connections Route management RoutesAdditional routes DNS Proxy AdvancedHostname Network Address Translation NAT/masquerading Dynamic DNS Interface aliases QoS Traffic Shaping Change MAC addressDialin Setup Dialin SetupDialin Setup Following table describes the fields on the Dial-In Setup Dialin User Accounts Account list Page Remote User Configuration Windows 95/98/MeDialin Setup Windows 2000/XP Dialin Setup Page Dhcp Server Dhcp Server ConfigurationDhcp Server Dhcp Server Interface Enable/DisableSubnet List SubnetDhcp Server Dhcp Proxy Firewall Incoming AccessFirewall Administration services CyberGuard SG Administrative Web Server SSL/HTTPS Secure Http SSL Certificate Setup Add Local and Private CertificatesOutgoing Interface Packet FilteringIncoming Interface ActionAddresses Service groups Rules Descriptive Name EnableDestination NAT/port forwarding Source Address Destination ServicesSource NAT Destination AddressTo-1 NAT Rules Access Control and Content Filtering User authenticationPage Browser setup Click AdvancedIP lists Web lists Content Reports CategoriesZoneAlarm Intrusion Detection Intrusion DetectionBenefits of using an IDS Basic Intrusion Detection and Blocking Page Advanced Intrusion Detection Advanced Intrusion Detection configuration Intrusion Detection Setting up the analysis server Page Web Cache Web CacheWeb cache is only available on SG575 models Web Cache Setup Cache size100 Web Cache Network SharesCreate a new user account Create the network share 101 Web CacheSet the CyberGuard SG appliance to use the network share 102 Web Cache103 Web Cache Set up LAN PCs to Use the Web CachePeers Virtual Private Networking 104 Virtual Private NetworkingPptp Client Setup 106 Virtual Private Networking Pptp Server Setup 107 Virtual Private NetworkingEnable and configure the Pptp VPN server 108 Virtual Private Networking109 Virtual Private Networking Data private as well as providing secure authenticationEncryption is strongly recommended. This keeps your Configuring user accounts for VPN server 111 Virtual Private Networking Configuring the remote VPN client 112 Virtual Private NetworkingWindows 95, Windows 98 and Windows Me Windows 114 Virtual Private Networking115 Virtual Private Networking Windows XP 116 Virtual Private NetworkingConnecting the remote VPN client 117 Virtual Private NetworkingCyberGuard SG appliance to CyberGuard SG appliance IPSec SetupSet up the Branch Office Enabling IPSec119 Virtual Private Networking 120 Virtual Private Networking Configure a tunnel to connect to the headquarters officeTunnel settings 121 Virtual Private Networking 122 Virtual Private Networking Local endpoint settings 123 Virtual Private Networking124 Virtual Private Networking Other options 125 Virtual Private Networking126 Virtual Private Networking 127 Virtual Private Networking Tcgid 128 Virtual Private Networking129 Virtual Private Networking Phase 1 settingsKept confidential 130 Virtual Private Networking Phase 2 settings 131 Virtual Private NetworkingConfiguring the Headquarters 132 Virtual Private Networking133 Virtual Private Networking 134 Virtual Private Networking Remote endpoint settingsLeave the Enable IP Payload Compression checkbox unchecked 135 Virtual Private Networking Remote party Tunnel ListConnection 136 Virtual Private NetworkingStatus 137 Virtual Private Networking138 Virtual Private Networking 139 Virtual Private Networking 140 Virtual Private Networking NAT Traversal SupportDynamic DNS Support 141 Virtual Private Networking Certificate ManagementExtracting certificates Creating certificates 142 Virtual Private NetworkingCreate the self-signed root CA certificate 143 Virtual Private NetworkingAdding certificates 144 Virtual Private NetworkingAdding a CA or CRL certificate 145 Virtual Private NetworkingAdding a local certificate 146 Virtual Private NetworkingTroubleshooting 147 Virtual Private Networking148 Virtual Private Networking 149 Virtual Private Networking 150 Virtual Private Networking LAN address Setting up a GRE tunnelCyberGuard SG appliance in Brisbane Internet address CyberGuard SG appliance in Slough Internet addressRemote subnet/netmask 10.1.0.0 GRE over IPSec 154 Virtual Private Networking Local Internal Address Place on Ethernet Bridge 155 Virtual Private NetworkingTroubleshooting 156 Virtual Private NetworkingL2TP VPN client 157 Virtual Private NetworkingL2TP server 158 Virtual Private NetworkingSet date and time SystemDate and Time NTP time serverLocality 160 SystemUsers 161 SystemEncrypted save/restore all AdministrationDiagnostic User settingsPassword DiagnosticsInternet access via access controls DiagnosticsNetwork tests 164 System165 System Configuration filesSystem log Flash upgrade Reboot Reset buttonTechnical Support 169 Appendix a IP Address Ranges Appendix a IP Address RangesB.c.d B.c.d-e B.c.d-e.f.g.h B.c.d/e 170 Appendix B Terminology Appendix B TerminologyTerm Meaning DNS 171 Appendix B TerminologyIDB 172 Appendix B TerminologyIsakmp 173 Appendix B TerminologyNTP 174 Appendix B TerminologySHA 175 Appendix B Terminology176 Access Logging Appendix C System LogEth1 Default DenyEth0 PppCreating Custom Log Rules 179 Appendix C System Log180 Appendix C System Log Iptables -I Forward -j LOG -i eth0 -p tcp 181 Appendix C System LogRate Limiting 182 Appendix C System Log183 Appendix C System Log Administrative Access LoggingBoot Log Messages Appendix D Firmware Upgrade Practices and Precautions 184 Appendix D Firmware Upgrade Practices and Precaut ions