User`s manual

VoIP/(802.11g) ADSL2+ (VPN) Firewall Router
Chapter 4: Configuration
39
DHCP Server
DHCP (Dynamic Host Configuration Protocol) allows your router to dynamically assign IP addresses to
PCs on your network if they are configured to obtain IP addresses automatically. You can enable or disable
the router’s DHCP server, or enable the router’s DHCP relay functions in this screen.
To change the DHCP operation of the router, select the required mode from the DHCP Server Mode
section and click Next
1. To disable the router’s DHCP Server, check Disabled and click Next, then click Apply. When the DHCP
Server is disabled you will need to manually assign a fixed IP address to each PCs on your network, and
set the default gateway for each PC to the IP address of the router (by default this is 192.168.1.254).
2. To configure the router’s DHCP Server, check DHCP Server and click Next. You can then configure
parameters of the DHCP Server including the IP pool (starting IP address and ending IP address to be
allocated to PCs on your network), lease time for each assigned IP address (the period of time the IP
address assigned will be valid), DNS IP address and the gateway IP address. These details are sent to the
DHCP client (i.e. your PC) when it requests an IP address from the DHCP server. Click Apply to enable
this function.
If you check “Use Router as a DNS Server”, the ADSL Router will perform the domain name lookup, find
the IP address from the outside network automatically and forward it back to the requesting PC in the
Local Area Network.
3. If you check
DHCP Relay Agent
and click
Next
, then you will have to enter the IP address of the DHCP
server which will assign an IP address back to the DHCP client in the LAN. Use this function only if advised
to do so by your network administrator or ISP.
Click Apply to enable this function.