D-Link DFL-1500 [49/271] Demands

DFL-900/1500 User Manual Chapter 4

System Tools

Chapter 4

System Tools

This chapter introduces System Management and explains how to implement it.

4.1 Demands

1. Basic configurations for domain name, password, system time, timeout and services.

2. DDNS: Suppose the DFL-1500’s WAN uses dynamic IP but needs a fixed host name. When the IP is changed, it is

necessary to have the DNS record updated accordingly. To use this service, one has to register the account, password, and

the wanted host name with the service provider.

3. DNS Proxy: Shorten the time of DNS lookup performed by applications.

4. DHCP Relay: It is to solve the problem that when the DHCP client is not in the same domain with the DHCP server, the

DHCP broadcast will not be received by the server. If the client is in the LAN (192.168.40.X) while the server is located in

the DMZ (10.1.1.4), the server will not receive any broadcast packet from the client.

5. The System Administrator would like to monitor the device from remote side efficiently.

6. Suppose our company applies three ISPs, but there are just two default WAN ports in the DFL-1500. You hope to connect

the whole ISP links to the DFL-1500. Note this capability is only valid in the DFL-1500 model.

4.2 Objectives

1. Configure the general properties, such as domain name, password, system time, and connection timeout correctly. Besides,

we can configure the prefered service name as the service name/numeric mapping list.

2. DDNS: By using the DDNS (Dynamic DNS), the DFL-1500 will send the request for modification of the corresponding

DNS record to the DDNS server after the IP is changed.

3. DNS Proxy: Reduce the number of DNS requests and the time for DNS lookup.

4. DHCP Relay: Enable the DHCP client to contact with the DHCP server located in different domain and get the required IP.

5. Through the SNMP manager, we can easily monitor the device status.

6. We hope to customize the interface of DFL-1500 to fit our requests.

4.3 Methods

1. Configure the domain name, password, system time, connection timeout and service name.

2. DDNS: Configure the DFL-1500 so that whenever the IP of the DFL-1500 is changed, it will send requests to the DDNS

server to refresh the DNS record. As the following

Figure 4-1 demonstrated, the original DFL-1 has registered WAN1 IP

address “61.2.1.1” on the DDNS server (www.dyndns.org). It’s domain name address is “me.dyndns.org”. If the WAN1 IP

address is reassigned by the ISP, DFL-1 will update the registered IP address “61.2.1.1” as the assigned one. This is the

base mechanism of the DDNS.