D-Link DFL-900 User Manual page 26

Firewall/vpn router

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3. DNS Proxy: After activating the DNS proxy mode, the client can set its DNS server to the DFL-900 (that is, send the DNS

requests to the DFL-900). The DFL-900 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.

4. DHCP Relay: Activate the DHCP relay mode of DFL-900 so that the DFL-900 will become the relay agent and relay the

DHCP broadcast to the configured DHCP server.

Figure 4-1 DDNS mechanism chart

Figure 4-2 DNS Proxy mechanism chart

Part I

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