FortiGate IPSec VPN User Guide - FirewallShop.com

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How to use this guide to configure an IPSec VPN Configuring IPSec VPNs FortiGate IPSec VPN Version 3.0 User Guide 18 01-30005-0065-20070716
Gateway-to-gateway configurations Configuration overview Gateway-to-gateway configurations This section explains how to set up a basic gateway-to-gateway (site-to-site) IPSec VPN. The following topics are included in this section: • Configuration overview • General configuration steps • Configure the VPN peers • Configuration example • How to work with overlapping subnets Configuration overview In a gateway-to-gateway configuration, two FortiGate units create a VPN tunnel between two separate private networks. All traffic between the two networks is encrypted and protected by FortiGate firewall policies. Figure 1: Example gateway-to-gateway configuration Site_1 Site_2 Internet FortiGate_1 FortiGate_2 Note: In some cases, computers on the private network behind one VPN peer may (by coincidence) have IP addresses that are already used by computers on the network behind the other VPN peer. In this type of situation (ambiguous routing), conflicts may occur in one or both of the FortiGate routing tables and traffic destined for the remote network through the tunnel may not be sent. To resolve issues related to ambiguous routing, see “How to work with overlapping subnets” on page 29. In other cases, computers on the private network behind one VPN peer may obtain IP addresses from a local DHCP server. However, unless the local and remote networks use different private network address spaces, unintended ambiguous routing and/or IP-address overlap issues may arise. For a discussion of the related issues, see “FortiGate dialupclient configurations” on page 71. FortiGate IPSec VPN Version 3.0 User Guide 01-30005-0065-20070716 19
Page 1 and 2: USER GUIDE FortiGate IPSec VPN Vers
Page 3 and 4: Contents Contents Introduction ....
Page 5 and 6: Contents Adding XAuth authenticatio
Page 7 and 8: Contents Defining IKE negotiation p
Page 9 and 10: Introduction About FortiGate IPSec
Page 11 and 12: Introduction About this document
Page 13 and 14: Introduction Fortinet documentation
Page 15 and 16: Configuring IPSec VPNs IPSec VPN ov
Page 17: Configuring IPSec VPNs General prep
Page 21 and 22: Gateway-to-gateway configurations G
Page 23 and 24: Gateway-to-gateway configurations C
Page 29 and 30: Gateway-to-gateway configurations H
Page 31 and 32: Gateway-to-gateway configurations H
Page 33 and 34: Hub-and-spoke configurations Config
Page 43 and 44: Hub-and-spoke configurations Dynami
Page 49 and 50: Dynamic DNS configurations Configur
Page 55 and 56: FortiClient dialup-client configura
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FortiClient dialup-client configura
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FortiGate dialup-client configurati
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Internet-browsing configuration Con
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Internet-browsing configuration Rou
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Redundant VPN configurations Config
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Redundant VPN configurations Config
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Redundant VPN configurations Redund
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Redundant VPN configurations Partia
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Transparent mode VPNs Configuration
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Transparent mode VPNs Configuration
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Transparent mode VPNs Configure the
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Manual-key configurations Configura
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Manual-key configurations Specify t
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IPv6 IPSec VPNs Overview of IPv6 IP
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IPv6 IPSec VPNs Site-to-site IPv6 o
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Auto Key phase 1 parameters Overvie
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Auto Key phase 1 parameters Authent
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Auto Key phase 1 parameters Definin
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Auto Key phase 1 parameters Definin
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Auto Key phase 1 parameters Using X
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Phase 2 parameters Basic phase 2 se
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Phase 2 parameters Advanced phase 2
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Configure the phase 2 parameters Ph
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Defining firewall policies Defining
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Monitoring VPN connections Monitori
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Logging VPN events Monitoring and t
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VPN troubleshooting tips Monitoring
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Index Encryption Algorithm, Manual
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Index remote peer authenticating wi
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