D-Link DFL-1500 [50/271] D link d link 42

Part II

Basic Configuration

D-Link 42

Figure 4-1 DDNS mechanism chart

3. DNS Proxy: After activating the DNS proxy mode, the client can set its DNS server to the DFL-1500 (that is, send the

DNS requests to the DFL-1500). The DFL-1500 will then make the enquiry to the DNS server and return the result to the

client. Besides, the caching mechanism performed by the DNS proxy can also help reduce possible duplicate DNS lookups.

As the following

Figure 4-2 described. DFL-1 redirects the DNS request from PC1_1 to the real DNS server (140.113.1.1).

Figure 4-2 DNS Proxy mechanism chart

4. DHCP Relay: Activate the DHCP relay mode of DFL-1500 so that the DFL-1500 will become the relay agent and relay the

DHCP broadcast to the configured DHCP server. As the following

Figure 4-3 described, DFL-1 redirects the DHCP