Configuring the FortiGate unit as a L2TP gateway

Configuring L2TP	PPTP and L2TP VPN

Figure 31: L2TP VPN between a Windows client and the FortiGate unit

Configuring the FortiGate unit as a L2TP gateway

Use the following procedures to configure the FortiGate unit as an L2TP gateway:

Adding users and user groups

To add a user for each L2TP client:

1Go to User > Local.

2Add and configure L2TP users.

See “Adding user names and configuring authentication” on page 202.

3Go to User > User Group.

4Add and configure L2TP user groups.

See “Configuring user groups” on page 207.

Enabling L2TP and specifying an address range

1Go to VPN > L2TP > L2TP Range.

2Select Enable L2TP.

3Enter the Starting IP and the Ending IP for the L2TP address range.

4Select the User Group that you added in “Adding users and user groups” on page 242.

5Select Apply to enable L2TP through the FortiGate unit.

242	Fortinet Inc.

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Fortinet 400 manual Configuring the FortiGate unit as a L2TP gateway, Enabling L2TP and specifying an address range, 242

Contents

Installation and Configuration Guide August Trademarks Regulatory Compliance Table of Contents NAT/Route mode installation High availability System status Network configuration 133 System configuration 157 Users and authentication 201 IPSec VPN 209 Network Intrusion Detection System Nids 249 Email filter 277 Glossary 295 Index 299 Contents Introduction Antivirus protection Web content filtering Email filtering NAT/Route mode Firewall Transparent mode Network intrusion detection VPN High availability Secure installation, configuration, and management Web-based manager Command line interface Logging and reporting What’s new in Version Firewall Replacement messagesUsers and authentication Email filter AntivirusWeb Filter About this document Document conventions Fortinet documentation Comments on Fortinet technical documentation Customer service and technical support Getting started Package contents Mounting Environmental specifications Powering onPower requirements FortiGate-400 LED indicators Connecting to the web-based manager Connecting to the web-based manager Bits per second 9600 Data bits Parity Connecting to the command line interface CLIFactory default FortiGate configuration settings Stop bits Flow control Interface Factory default NAT/Route mode network configurationAccount Factory default Transparent mode network configuration Factory default firewall configuration Factory default content profiles Strict content profile Options Strict content profileScan content profile Scan content profile Options Web content profile Options Web content profileUnfiltered content profile Unfiltered content profile Options Planning your FortiGate configuration NAT/Route mode with multiple external network connections Example NAT/Route mode network configuration Configuration options Setup Wizard FortiGate model maximum values matrix Front keypad and LCD Next steps Next steps Getting started NAT/Route mode settings Administrator Password Interface NAT/Route mode installationPreparing to configure NAT/Route mode Reconnecting to the web-based manager Using the setup wizardStarting the setup wizard Configuring the FortiGate unit to operate in NAT/Route mode Using the front control buttons and LCDUsing the command line interface Configuring NAT/Route mode IP addresses Set system interface port2 mode static ip IPaddress netmask Connecting the FortiGate unit to your networks Configuring interface Configuring your networkCompleting the configuration Go to System Network Interface Enabling antivirus protection Configuring interface 4/HASetting the date and time Registering your FortiGate unit Configuration example Multiple connections to the Internet Configuring virus and attack definition updates Configuring Ping servers Example multiple Internet connection configuration Destination based routing examples Primary and backup links to the InternetUsing the CLI Go to System Network Routing Table Load sharing Load sharing and primary and secondary connections Adding the routes using the CLI Routing table should have routes arranged as shown in Table Routing a service to an external network Policy routing examples Go to Firewall Policy port1-port3 Adding a redundant default policyFirewall policy example Restricting access to a single Internet connection Adding more firewall policies Configuration example Multiple connections to the Internet Transparent mode settings Administrator Password Transparent mode installationPreparing to configure Transparent mode DNS Settings Changing to Transparent mode Go to System Status Set system opmode transparent Configuring the Transparent mode management IP address Configure the Transparent mode default gateway Registering your FortiGate Transparent mode configuration examples FortiGate-400 Transparent mode connections Default routes and static routes General configuration steps Default route to an external network Go to System Network Management Web-based manager example configuration stepsCLI configuration steps Go to System Network Routing Static route to an external destination Set system route number 1 dst 24.102.233.5 255.255.255.0 gw1 Example static route to an internal destination Set system route number 1 dst 172.16.1.11 255.255.255.0 gw1 Transparent mode configuration examples High availability Active-passive HA Active-active HA Configuring the HA interfaces HA in NAT/Route modeInstalling and configuring the FortiGate units Configuring the HA cluster Go to System Config HA Weighted Round Robin Least Connection Connecting the HA cluster to your network Example Active-Active HA configuration HA network configuration Starting the HA cluster HA in Transparent modeConfiguring the HA interface and HA IP address HA in Transparent mode None Sample active-passive HA configuration Go to System Status Cluster Members Managing the HA clusterViewing the status of cluster members Monitoring cluster members Go to System Status Monitor Go to System Status Session Monitoring cluster sessionsViewing and managing cluster log messages Go to Log&Report Logging Synchronizing the cluster configuration Managing individual cluster units Returning to standalone configuration Replacing a FortiGate unit after fail-over Advanced HA options Selecting a FortiGate unit to a permanent primary unit Configuring weighted-round-robin weights Set system ha weight 1 3 System status System status Changing the FortiGate firmware Firmware upgrade procedures Procedure DescriptionChanging the FortiGate host name Upgrading the firmware using the CLI Upgrade to a new firmware versionUpgrading the firmware using the web-based manager Execute restore image namestr tftpip Revert to a previous firmware version Reverting to a previous firmware version using the CLI Execute ping Install a firmware image from a system reboot using the CLI To install firmware from a system reboot Execute reboot 100 101 Test a new firmware image before installing itRestoring your previous configuration 102 103 Installing and using a backup firmware imageInstalling a backup firmware image 104 Switching to the backup firmware image 105 106 Manual virus definition updatesSwitching back to the default firmware image Displaying the FortiGate up time Manual attack definition updatesDisplaying the FortiGate serial number Displaying log hard disk status Restoring system settings to factory defaults Backing up system settingsRestoring system settings 108 Restarting the FortiGate unit Changing to Transparent modeChanging to NAT/Route mode 109 Viewing CPU and memory status Shutting down the FortiGate unitSystem status Viewing sessions and network status 111 Viewing virus and intrusions status Sessions and network status monitor Viewing the session list Go to System Status Session Session list113 114 115 Virus and attack definitions updates and registrationUpdating antivirus and attack definitions Connecting to the FortiResponse Distribution Network Version Expiry date Last update attempt Last update status 117 Configuring scheduled updatesGo to System Update Successful Update FDN error Configuring update loggingGo to Log&Report Log Setting Manually updating antivirus and attack definitions Configuring push updatesAdding an override server 119 Push updates through a NAT device To enable push updatesAbout push updates Example push updates through a NAT device General procedure 121 122 Go to Firewall Virtual IP Adding a firewall policy for the port forwarding virtual IP Schedule Always Service ANY Action Accept123 Scheduled updates through a proxy server 124 125 FortiCare Service ContractsRegistering FortiGate units Registering the FortiGate unit 126 127 Registering a FortiGate unit product information Viewing the list of registered FortiGate units Recovering a lost Fortinet support passwordUpdating registration information 128 129 Registering a new FortiGate unitAdding or changing a FortiCare Support Contract number Changing your contact information or security question Changing your Fortinet support passwordDownloading virus and attack definitions updates 130 Registering a FortiGate unit after an RMA 131 132 Adding zones Network configurationConfiguring zones 133 Renaming zones Adding interfaces to a zoneAdding Vlan subinterfaces to a zone 134 Viewing the interface list Configuring interfacesDeleting zones Bringing up an interface Adding a ping server to an interface Changing an interface static IP addressAdding a secondary IP address to an interface 136 Changing the MTU size to improve network performance Controlling management access to an interfaceConfiguring traffic logging for connections to an interface 137 Configuring port4/ha as a firewall interface Configuring port4/haConfiguring port4/ha for HA mode Configuring the management interface Transparent mode 139 Configuring VLANsVlan network configuration Typical Vlan network configuration 140 Rules for Vlan IP addresses Adding Vlan subinterfacesRules for Vlan IDs Adding a Vlan subinterface 142 Adding a Vlan subinterface Adding destination-based routes to the routing table Configuring routingAdding a default route 143 144 145 Adding routes in Transparent modeConfiguring the routing table 146 Policy routing command syntaxPolicy routing 147 Providing Dhcp services to your internal networkSet system dhcpserver command syntax Keywords Description 148 RIP configuration 149 150 RIP settingsGo to System RIP Settings Configuring RIP settings 151 152 Configuring RIP for FortiGate interfacesPassword Mode Adding RIP neighbors Go to System RIP Neighbor Adding RIP neighbors153 154 Adding RIP filtersAdding a single RIP filter Go to System RIP Filter Add the IP address of the route Adding a RIP filter list155 Mask Add the netmask of the route Action 156 Adding a neighbors filterAdding a routes filter To set the date and time Go to System Config Time System configurationSetting system date and time 157 158 To set the system idle timeoutChanging web-based manager options 159 To set the Auth timeoutTo modify the Dead Gateway Detection settings To select a language for the web-based manager Go to System Config Admin Adding and editing administrator accountsAdding new administrator accounts 160 161 Editing administrator accountsTo edit an administrator account Go to System Config Admin Configuring FortiGate Snmp support Configuring SnmpConfiguring the FortiGate unit for Snmp monitoring Go to System Config Snmp v1/v2c Trap Community Trap Receiver IP Addresses FortiGate MIBs163 FortiGate MIBs MIB file name Description EtherLike.mib 164 Customizing replacement messagesFortiGate traps FortiGate traps Trap message Description 165 Customizing replacement messagesGo to System Config Replacement Messages Alert email message sections Customizing alert emails166 167 Alert email message sections 168 Firewall configuration 169 Vlan subinterfaces Default firewall configurationInterfaces 170 Addresses Default addresses Interface Address DescriptionZones 171 Adding firewall policies ServicesContent profiles Schedules Destination Firewall policy optionsSource 173 Action ServiceSchedule VPN Tunnel 175 AuthenticationTraffic Shaping Anti-Virus & Web filter 176 Comments Configuring policy listsLog Traffic Policy matching in detail Disabling a policy Changing the order of policies in a policy listEnabling and disabling policies Enabling a policy 179 AddressesAdding addresses Go to Firewall Address 180 Editing addressesDeleting addresses Go to Firewall Address Group Organizing addresses into address groups181 182 ServicesPredefined services 183 Https 184 Providing access to custom servicesGo to Firewall Service Custom 185 Grouping servicesGo to Firewall Service Group 186 SchedulesCreating one-time schedules Go to Firewall Schedule One-time Go to Firewall Schedule Recurring Creating recurring schedules187 188 Virtual IPsAdding a schedule to a policy Adding static NAT virtual IPs 189 Adding port forwarding virtual IPs 190 Adding policies with virtual IPs 191 192 IP poolsAdding an IP pool Go to Firewall IP Pool IP pools and dynamic NAT IP/MAC bindingIP Pools for firewall policies that use fixed ports 193 Go to Firewall IP/MAC Binding Static IP/MAC Go to Firewall IP/MAC Binding Setting194 Adding IP/MAC addresses 195 196 Viewing the dynamic IP/MAC listEnabling IP/MAC binding Go to Firewall IP/MAC Binding Dynamic IP/MAC Adding a content profile Content profilesDefault content profiles Go to Firewall Content Profile Quarantine 198File Block Oversized File/Email Block Pass Fragmented Email Adding a content profile to a policy 199 200 Users and authentication 201 Adding user names and configuring authentication Setting authentication timeoutAdding user names and configuring authentication 202 Deleting user names from the internal database 203 Deleting Radius servers Configuring Radius supportAdding Radius servers 204 205 Configuring Ldap supportAdding Ldap servers Go to User Ldap Deleting Ldap servers 206 207 Configuring user groupsAdding user groups Go to User User Group Deleting user groups 208 IPSec VPN 209 AutoIKE with pre-shared keys Key managementManual Keys AutoIKE with certificates Adding a manual key VPN tunnel General configuration steps for a manual key VPNManual key IPSec VPNs 211 212 Go to VPN Ipsec Phase General configuration steps for an AutoIKE VPNAdding a phase 1 configuration for an AutoIKE VPN AutoIKE IPSec VPNs Remote Gateway Dialup User 214Remote Gateway Static IP Address Configuring advanced options 215 216 Adding a phase 2 configuration for an AutoIKE VPN 217 218 219 Managing digital certificatesObtaining a signed local certificate Go to VPN Local Certificates Generating the certificate request220 221 Downloading the certificate requestRequesting the signed local certificate 222 Retrieving the signed local certificateImporting the signed local certificate Importing a CA certificate Obtaining a CA certificateRetrieving a CA certificate 223 Configuring encrypt policies 224 Adding an encrypt policy Adding a source addressAdding a destination address 225 226 Adding an encrypt policy 227 VPN concentrator hub general configuration stepsIPSec VPN concentrators 228 Source InternalAll Destination VPN spoke address Action Go to VPN IPSec Concentrator Adding a VPN concentrator229 VPN Tunnel VPN spoke general configuration steps230 Policies 231 Configuring redundant IPSec VPNRedundant IPSec VPNs See Adding a phase 1 configuration for an AutoIKE VPN on 232 Viewing dialup VPN connection status Monitoring and Troubleshooting VPNsViewing VPN tunnel status 233 Go to VPN IPSec Dialup Testing a VPN234 235 Configuring PptpPptp and L2TP VPN Enabling Pptp and specifying an address range Configuring the FortiGate unit as a Pptp gatewayAdding users and user groups 236 Adding an address group 237 Go to Start Settings Control Panel Network Configuring a Windows 98 client for PptpInstalling Pptp support Adding a firewall policy Configuring a Windows 2000 client for Pptp Configuring a Pptp dialup connectionConnecting to the Pptp VPN 239 240 Configuring a Windows XP client for PptpConfiguring the VPN connection Go to Start Control Panel Configuring L2TP 241 242 Configuring the FortiGate unit as a L2TP gatewayEnabling L2TP and specifying an address range Go to VPN L2TP L2TP Range Sample L2TP address range configuration 243 244 Disabling IPSec Configuring a Windows 2000 client for L2TPConfiguring an L2TP dialup connection 245 Configuring an L2TP VPN dialup connection Connecting to the L2TP VPNConfiguring a Windows XP client for L2TP Go to Start Settings 247 248 249 Network Intrusion Detection System NidsDetecting attacks Disabling the Nids Configuring checksum verificationSelecting the interfaces to monitor 250 251 Viewing the signature listViewing attack descriptions Go to Nids Detection Signature List 252 Enabling and disabling Nids attack signaturesAdding user-defined signatures Go to Nids Detection User Defined Signature List Enabling Nids attack prevention Preventing attacksDownloading the user-defined signature list 253 254 Setting signature threshold valuesEnabling Nids attack prevention signatures 255 Logging attacks Configuring synflood signature valuesValue Description Minimum Maximum Default Logging attack messages to the attack log Manual message reduction Reducing the number of Nids attack log and email messagesAutomatic message reduction 257 258 259 General configuration stepsAntivirus protection To scan FortiGate firewall traffic for viruses Antivirus scanning260 File blocking 261 262 Blocking files in firewall trafficAdding file patterns to block Go to Anti-Virus File Block Quarantining infected files Go to Anti-Virus Quarantine Quarantine ConfigQuarantine Quarantining blocked files 264 Viewing the quarantine listSorting the quarantine list Go to Anti-Virus Quarantine Deleting files from quarantine Configuring quarantine optionsFiltering the quarantine list Downloading quarantined files Exempting fragmented email from blocking Configuring limits for oversized files and emailBlocking oversized files and emails Viewing the virus list Web filtering 267 Adding words and phrases to the banned word list Content blockingGo to Web Filter Content Block 268 Adding URLs or URL patterns to the block list Using the FortiGate web filterURL blocking 269 Clearing the URL block list 270 271 Downloading the URL block listUploading a URL block list Adding a Cerberian user to the FortiGate unit Using the Cerberian web filterInstalling a Cerberian license key on the FortiGate unit 272 To configure the Cerberian web filtering Configuring Cerberian web filterAbout the default group and policy Enabling Cerberian URL filtering Selecting script filter options Script filteringEnabling the script filter 274 275 Exempt URL listAdding URLs to the exempt URL list Go to Web Filter Exempt URL 276 Example exempt URL list Email filter 277 278 Go to Email Filter Content BlockEmail banned word list Adding address patterns to the email block list Email block listEmail exempt list 279 Adding address patterns to the email exempt list To add a subject tag Go to Email Filter ConfigAdding a subject tag 280 281 Logging and reportingRecording logs 282 Recording logs on a remote computerRecording logs on a NetIQ WebTrends server Overwrite Recording logs on the FortiGate hard disk283 Option 284 Filtering log messagesRecording logs in system memory Example log filter configuration 285 Enabling traffic logging for an interface Configuring traffic loggingEnabling traffic logging Enabling traffic logging for a Vlan subinterface Enabling traffic logging for a firewall policy Configuring traffic filter settingsGo to Log&Report Log Setting Traffic Filter 287 288 Destination IP Address Destination Netmask ServiceAdding traffic filter entries Searching logs Viewing logs saved to memoryViewing logs 289 Viewing and managing logs saved to the hard disk 290 291 Downloading a log file to the management computerDeleting all messages in an active log Adding alert email addresses Configuring alert emailDeleting a saved log file 292 293 Testing alert emailEnabling alert email Go to Log&Report Alert Mail Categories 294 Glossary 295 296 297 298 299 IndexNumerics 300 Index 301 FDS 302 Ldap 303 MIB 304 305 RMA 306 TCP 307 VPN 308

Fortinet 400 Configuring the FortiGate unit as a L2TP gateway, 242, Go to VPN L2TP L2TP Range

Models: 400

Figure 31: L2TP VPN between a Windows client and the FortiGate unit

Configuring the FortiGate unit as a L2TP gateway

Adding users and user groups

1Go to User > Local.

3Go to User > User Group.

Enabling L2TP and specifying an address range

1Go to VPN > L2TP > L2TP Range.

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