Private Ip Addresses; Dns Server Address; Lan Configuration; Figure 4-1 System Settings: Wan/Lan: Lan Configuration - ZyXEL Communications VSG-1200 User Manual

VSG-1200 Vantage Service Gateway
4.4.2

Private IP Addresses

Every machine on the Internet must have a unique address. If your networks are isolated from the Internet, for
example, only between your two branch offices, you can assign any IP addresses to the hosts without problems.
However, the Internet Assigned Numbers Authority (IANA) has reserved the following three blocks of IP addresses
specifically for private networks:
10.0.0.0
172.16.0.0
192.168.0.0
You can obtain your IP address from the IANA, from an ISP or it can be assigned from a private network. If you
belong to a small organization and your Internet access is through an ISP, the ISP can provide you with the Internet
addresses for your local networks. On the other hand, if you are part of a much larger organization, you should
consult your network administrator for the appropriate IP addresses.
Regardless of your particular situation, do not create an arbitrary IP address; always follow the guidelines above.
For more information on address assignment, please refer to RFC 1597, Address Allocation for Private Internets
and RFC 1466, Guidelines for Management of IP Address Space.

4.5 DNS Server Address

DNS (Domain Name System) is for mapping a domain name to its corresponding IP address and vice versa, for
example, the IP address of www.zyxel.com is 204.217.0.2. The DNS server is extremely important because without
it, you must know the IP address of a machine before you can access it. The DNS server addresses that you enter in
the DHCP setup are passed to the client machines along with the assigned IP address and subnet mask.
There are two ways that an ISP disseminates the DNS server addresses. The first is for an ISP to tell a customer the
DNS server addresses, usually in the form of an information sheet, when s/he signs up. The second is to obtain the
DNS server information automatically when a computer is set as a DHCP client.
4.6

LAN Configuration

To configure the LAN settings on the VSG, click System Settings and WAN/LAN to display the screen as shown.
The following table describes the LAN-related fields in this screen.
4-2
— 10.255.255.255
— 172.31.255.255
— 192.168.255.255

Figure 4-1 System Settings: WAN/LAN: LAN Configuration

LAN, WAN and Server Setup