for most applications, the default dhcp and tcp/ip settings of the firewall are satisfactory. see “ip configuration by dhcp” on page b-10” for an explanation of dhcp and information about how to assign ip addresses for your network.
if another device on your network will be the dhcp server, or if you will manually configure the network settings of all of your computers, clear the use router as dhcp server check box. otherwise, leave it checked.
specify the pool of ip addresses to be assigned by setting the starting ip address and ending ip address. these addresses should be part of the same ip address subnet as the firewall’s lan ip address. using the default addressing scheme, you should define a range between 192.168.0.2 and 192.168.0.253, although you may wish to save part of the range for devices with fixed addresses.
the firewall will deliver the following parameters to any lan device that requests dhcp:
1 an ip address from the range you have defined
2 subnet mask
3 gateway ip address is the firewall’s lan ip address
4 primary dns server, if you entered a primary dns address in the basic settings menu; otherwise, the firewall’s lan ip address
5 secondary dns server, if you entered a secondary dns address in the basic settings menu
6 wins server, short for windows internet naming service server, determines the ip address associated with a particular windows computer. a wins server records and reports a list of names and ip address of windows pcs on its local network. if you connect to a remote network that contains a wins server, enter the server’s ip address here. this allows your pcs to browse the network using the network neighborhood feature of windows.
procedure 7-1: using reserved ip addresses
when you specify a reserved ip address for a pc on the lan, that pc will always receive the same ip address each time it access the firewall’s dhcp server. reserved ip addresses should be assigned to servers that require permanent ip settings.
to reserve an ip address:
1.click the add button.
2.in the ip address box, type the ip address to assign to the pc or server. choose an ip address from the router’s lan subnet, such as 192.168.0.x.
3.type the mac address of the pc or server.
if the pc is already present on your network, you can copy its mac address from the attached devices menu and paste it here.
4.click apply to enter the reserved address into the table.
the reserved address will not be assigned until the next time the pc contacts the router's dhcp server. reboot the pc or access its ip configuration and force a dhcp release and renew.
to edit or delete a reserved address entry:
1.click the radio button next to the reserved address to select the entry you want to edit or delete.
2.click edit or delete.
procedure 7-2: configuring lan tcp/ip settings
1.log in to the firewall at its default lan address of http://192.168.0.1 with its default user name of admin, default password of password, or using whatever password and lan address you have chosen for the firewall.
2.from the main menu, under advanced, click the lan ip setup link to view the menu, shown below.
3.enter the upnp, tcp/ip, mtu, or dhcp parameters.
4.click apply to save your changes.