D-Link DFL-200 manual Servers, Dhcp Server Settings

Page 59

Servers

DHCP Server Settings

The DFL-200 contains a DHCP server; DHCP (Dynamic Host Configuration Protocol) is a protocol that lets network administrators to automatically assign IP numbers to computers on

anetwork. The DFL-200 DHCP Server helps to minimize the work necessary to administer a network, as there is no need for another server running DHCP Server software.

The DFL-200 DHCP Server only implements a subset of the DHCP protocol necessary to serve a small network, these are:

•IP address

•Netmask

•Subnet

•Gateway address

•DNS Servers

•WINS Servers

•Domain name

The DFL-200 DHCP

Server assigns and manages IP addresses from specified address pools within the firewall to the DHCP clients.

Note: Leases are remembered over a re-configure or reboot of the firewall.

The DFL-200 also includes a DHCP Relayer. A DHCP relayer is a form of gateway between a DHCP Server and its users. The relayer intercepts DHCP queries from the users and forwards them to a DHCP server while setting up dynamic routes based on leases. This enables the firewall to keep an accurate routing table based on active users and protects the DHCP server to some degree among other things.

Note: There can only be one DHCP Server or DHCP Relay configured per interface.

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Contents Link DFL-200 Contents VPN Servers 111 125 122Introduction to Firewalls Features and BenefitsAccess Control supported IntroductionIntroduction to Local Area Networking Physical Connections LEDsSystem Requirements Package ContentsManaging D-Link DFL-200 Resetting the DFL-200Administrative Access Administration SettingsAdd Admin access to an interface Add ping access to an interfaceEnable Snmp access to an interface Add Read-only access to an interfaceChange IP of the LAN or DMZ interface SystemInterfaces IP Address The IP address of the WAN interface. This is WAN Interface Settings Using Static IPWAN Interface Settings Using Dhcp Password WAN Interface Settings Using PPPoEWAN Interface Settings Using Pptp Password The password supplied to you by your ISP WAN Interface Settings Using BigPondMTU Configuration Routing Go to System and Routing Add a new Static RouteRemove a Static Route Logging Enable E-mail alerting for ISD/IDP events Enable LoggingEnable Audit Logging Page Time Checking the Set the system time box Using NTP to sync timeSetting time and date manually Changing time zoneAction Types FirewallPolicy Policy modesSchedule Service FilterSource and Destination Filter Add a new policy Intrusion Detection / PreventionChange order of policy Configure Intrusion DetectionEnable the Delete policy checkbox Enable the Intrusion Detection / Prevention checkboxConfigure Intrusion Prevention Add a new mapping Port mapping / Virtual ServersDelete mapping Enable the Delete mapping checkboxDFL-200 Radius Support UsersEnable Radius Support Enable User Authentication via Http / HttpsAdd User Change User PasswordEnable the Change password checkbox Delete User Enable the Delete user checkboxAdd new recurring schedule SchedulesAdding TCP, UDP or TCP/UDP Service ServicesAdding IP Protocol Grouping ServicesProtocol-independent settings Introduction to IPSec VPNPoint-to-Point Protocol Introduction to PptpIntroduction to L2TP MPPE, Microsoft Point-To-Point Encryption Authentication ProtocolsL2TP/PPTP Clients Authentication protocolL2TP/PPTP Servers Authentication Protocol Introduction chapterMppe encryption Creating a LAN-to-LAN IPSec VPN Tunnel VPN between two networksCreating a Roaming Users IPSec VPN Tunnel VPN between client and an internal networkAdding a L2TP/PPTP VPN Server Adding a L2TP/PPTP VPN ClientVPN Advanced Settings IPSec Proposal List Proposal ListsIKE Proposal List Certificates of remote peers CertificatesTrusting Certificates Local identitiesIdentities Active content handling Content FilteringEdit the URL Global Whitelist Edit the URL Global Blacklist Active content handling Servers Dhcp Server SettingsEnable by checking the Use built-in Dhcp Server box Enable Dhcp ServerEnable Dhcp Relay Disable Dhcp Server/RelayerEnable by checking the Enable DNS Relayer box DNS Relayer SettingsEnable DNS Relayer Disable DNS Relayer Ping ToolsPing Example Add Dynamic DNS SettingsDynamic DNS Restoring the DFL-200’s Configuration BackupExporting the DFL-200’s Configuration Restarting the DFL-200 Restart/ResetRestoring system settings to factory defaults Page Upgrade IDS Signature-database UpgradeUpgrade Firmware CPU Load StatusSystem Interfaces VPN Click Connections below it. a window will ConnectionsDhcp Server Logging Conn events How to read the logsUsage events Drop eventsClose Example Open ExampleStep by step guides LAN IP 192.168.4.1, Subnet mask LAN-to-LAN VPN using IPsecRemote Net 192.168.1.0/24 Enable Automatically add a route for the remote networkLocal net 192.168.1.0/24 LAN IP 192.168.1.1, Subnet maskRemote Net 192.168.4.0/24 LAN-to-LAN VPN using Pptp Username BranchOffice Click Global policy parameters Settings for Main office Page Under Users in local database click Add new Select Local databasePage LAN-to-LAN VPN using L2TP Username BranchOffice Check Use IPsec encryption Setup interfaces, System-Interfaces WAN IP193.0.2.20 Page Select Local database Under Users in local database click Add new More secure LAN-to-LAN VPN solution Page Page Settings for Main office Windows XP client and Pptp server Settings for the Windows XP clientSelect Connect to the network at my workplace and click Next Select Virtual Private Network connection and click Next Name the connection MainOffice and click Next 104 Select Do not dial the initial connection and click Next Page Click Properties Page Name the new user HomeUser Enter password Retype password Page Windows XP client and L2TP server 112 Settings for Main office Page Content filtering Select HTTP/HTML Content Filtering in the ALG dropdown Firewall-ServicesPage Page Intrusion detection and prevention Page Check Enable E-mail alerting for IDS/IDP events Appendix a Icmp Types and Codes AppendixesPage ESP Appendix B Common IP Protocol NumbersLimited Warranty What Is Not Covered Wichtige Sicherheitshinweise Attenzione CE Mark WarningWarnung Advertencia de Marca de la CEVcci Warning Offices Singapore D-LINK International 132

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