D-Link DI-206 manual How NAT Works

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DI-206 ISDN Remote Router

Network Address Port Translation (NAPT) is a subset of NAT where many local IP addresses and their TCP/UDP port numbers are translated to a single global IP address and it’s TCP/UDP port number. In this document, the term NAT will refer to both NAT and NAPT unless otherwise stated.

NAT can work in conjunction with DHCP. Thus, if both are enabled and properly configured, the DHCP server in the DI-206 will assign local IP addresses to computers on your network.

How NAT Works

In the most common NAT configuration, your network uses local IP addresses that are not valid on the Internet. Internet (global) IP addresses are unique, with no two devices have the same IP address. The local IP addresses can be freely assigned to computers on your network by your network administrator (within guidelines defined later in this chapter and in Appendix B, “IP Concepts”). This can be done manually or by using DHCP. The ISDN port on the router is assigned a globally unique IP Address that IS valid on the Internet, since it will be sending and receiving data directly to the Internet and is therefore part of it. Please study the example diagram below carefully.

Single

Global

IP Address

176.220.22.1

ISDN

PortWAN

Router NAT

Translator

LAN

Port

Local IP

LAN

192.168.100.1

192.168.100.2 192.168.100.3 192.168.100.4 192.168.100.5

Please note that in the above diagram, the Gateway IP address settings for the local PC’s needs to be set to 192.168.100.1, the LAN IP address of the router.

NAT manipulates the IP addresses in packet headers on a one-to-one basis. An outgoing data packet (a packet originating from a computer on the local LAN and destined for a computer outside the private network) will have its IP address translated as shown below.

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Contents DI-206 Isdn Router User’s Guide Page CE Mark Warning FCC WarningHardware Link Offices for Registration and Warranty ServiceSoftware Wichtige Sicherheitshinweise Page Table of Contents Using Telnet 102 101104 Page Ease of Installation Product FeaturesIntroduction Built-in HubDhcp Support Dynamic Host Configuration Protocol Radius Remote Authentication Dial In User ServiceIsdn Leased Line Standard Phone JacksWhat This Manual Covers Applications for your DI-206Other Resources What This Manual Doesn’t CoverPacking List Additional Installation RequirementsDI-206 Front Panel InstallationOrdering Your Isdn Line DI-206 Rear Panel Installation and Initial Configuration Telephone FeaturesConnecting the Console to the Router Setting up the ConsoleConnecting an Isdn Line to the Router Using the ConsoleConnecting a Telephone or Fax Machine to the Router Connecting Ethernet Cables to the RouterDevice Port Device Being Cable to USE Used Connected Type Important Notes on Ethernet ConnectionsInitial Configuration of the Router Powering Up Devices for Initial ConfigurationConfiguring the LAN Port Choose Network Configuration, IP Configuration Choose Interface Configuration, LANFrom the Main Menu choose Advanced Functions Plugging in All Devices Console Program Main Menu Configuration and ManagementSystem Information Interface Configuration LAN DI-206 Isdn Remote Router Network Configuration IP Stack Configuration DI-206 Isdn Remote Router DI-206 Isdn Remote Router IP Static Route Examples IP Static RouteIP Networking Snmp Agent ConfigurationRouter Advertisement Snmp Community Configuration Snmp Authenticated Trap Snmp Trap Manager ConfigurationAdvanced Functions Remote Access ConfigurationRemote Operation Overview Remote Network Connections DI-206 Isdn Remote Router Dial Configuration Dial-In User Profile DI-206 Isdn Remote Router Remote Network Profile Phone Number Supplied by Toggle between Router and CallerDI-206 Isdn Remote Router Incoming Outgoing Dhcp ConfigurationDynamic IP Pool Dhcp Server ConfigurationDI-206 Isdn Remote Router Static IP Pool Dhcp Relay Agent Filter ConfigurationFilter State of Interface Configuring a Filter SetLayer 2 Filter IP Filter DI-206 Isdn Remote Router Multiple Home Configuration DI-206 Isdn Remote Router Static ARP NAT Configuration How NAT Works NAT Setting Local IP Addresses Configure NAT/NAPT DI-206 Isdn Remote Router Dynamic NAT Static NAT Dynamic NaptStatic Napt Configure Napt for Special ApsDI-206 Isdn Remote Router Telnet/Discovery Enable DNS Configuration Host Table Multi-Link PPP Configuration Radius ConfigurationDI-206 Isdn Remote Router Admin Configuration System Status System MaintenanceCounter StatisticsLAN Counter Table DI-206 Isdn Remote Router Isdn Counter Table Runtime Tables IP Routing Table PPP Table ARP TableLog Configuration Event/Error LogLog and Trace View Log File Trace Buffer Trace Buffer ConfigurationPacket Triggered Last Call View Trace BufferConnection Test DiagnosticLoopback Test Ping TestSystem LAN System Isdn Software UpdateSystem Restart System Settings Backup/Restore Factory ResetRestore System Settings Backup System SettingsDI-206 Isdn Remote Router System Configuration Prom System ConfigurationSystem Reset TCP/IP Parameters ConfigurationSoftware Update Execute Bootload Eeprom Factory ResetDI-206 Isdn Remote Router Telnet Configuration Using TelnetUsing Telnet via LAN Using Telnet via IsdnSystem Timeout Installing a Radius Server Using Radius AuthenticationConfiguring the DI-206 for Radius Authentication Adding Users to the Radius Database Some Common Problems With the DI-206 Appendix a TroubleshootingProblems With the Isdn Line Problems with the LAN InterfaceDI-206 Isdn Remote Router IP Addresses Appendix B IP ConceptsIP Network Classes Subnet Mask IP Protocol Numbers Appendix C IP Protocol and Port NumbersIP Port Numbers General Appendix D Technical SpecificationsPhysical & Environmental Appendix E Country ID Numbers Configuration File Example Appendix F Configuration File103 BAP IndexSee LAN Snmp Offices Registration Card

DI-206 specifications

The D-Link DI-206 is a versatile and reliable networking solution designed to cater to the demands of both home and small office environments. This router is equipped with a range of features and technologies that ensure efficient connectivity and seamless online experiences.

One of the key highlights of the D-Link DI-206 is its robust and user-friendly interface, which is ideal for users of all technical levels. It offers an easy setup process, typically involving a simple web-based configuration that allows users to get their network up and running in no time. The device supports multiple operating modes, including router and access point modes, making it flexible and adaptable to varying networking requirements.

The DI-206 is equipped with dual WAN ports, which provide users with the ability to connect to two separate internet connections. This feature enhances reliability and ensures continuous internet access, as it can automatically switch to a backup connection if the primary line fails. Such redundancy is particularly advantageous for businesses that require uninterrupted connectivity for operations.

In terms of performance, the D-Link DI-206 supports advanced wireless standards, offering data transfer rates that cater to modern bandwidth needs. With dual-band capabilities, it can operate on both 2.4GHz and 5GHz frequencies, allowing users to maximize their wireless coverage while minimizing interference from other devices. This is essential for activities such as streaming, gaming, and video conferencing, where bandwidth demands can be high.

Security is another critical aspect of the D-Link DI-206. It incorporates comprehensive security features, including WPA/WPA2 encryption to protect user data from unauthorized access. Additionally, the router features a built-in firewall and supports VPN passthrough, providing an extra layer of security for users engaging in sensitive online activities.

The DI-206 also offers multiple Ethernet ports for wired connections, enabling users to connect various devices such as computers, printers, and gaming consoles directly to the network. This ensures stable and high-speed internet access for devices that require a consistent connection.

Overall, the D-Link DI-206 stands out as a reliable networking device that combines performance, versatility, and security. Whether for home use or small office environments, it provides an effective solution for users looking to establish a strong and secure network. With its range of features and technologies, the DI-206 is a compelling option for those seeking to enhance their online connectivity and overall experience.
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