Chapter 7 Server; Dhcp Configuration; Public And Private Address Assignment; Server Configuration - ZyXEL Communications Vantage Service Gateway VSG-1200 V2 User Manual

This chapter shows you how to configure the internal web server and set up DHCP settings
and email server redirect on the VSG..

7.1 DHCP Configuration

DHCP (Dynamic Host Configuration Protocol) allows the individual clients (Ethernet device)
to obtain the TCP/IP configuration from a centralized DHCP server. The VSG has built-in
DHCP server capability, which means it can assign IP addresses, an IP default gateway and
DNS servers to computer systems that support the DHCP client when this feature is activated.
The VSG can also act as a surrogate DHCP server where it relays IP address assignment from
the actual DHCP server to the clients.

7.1.1 Public and Private Address Assignment

When you configure the VSG as a DHCP server, you can set the VSG to assign private or
public IP addresses to subscriber computer(s) connected to the LAN port.
In most cases, the VSG assigns private IP address to subscriber computer(s) connected on the
LAN. When the subscribers access the Internet, NAT is applied. This allows multiple
computers to share one Internet connection.
With public IP address assignment through DHCP, the VSG assigns public IP addresses to
subscribers connected on the LAN. In this case, the VSG works as a bridge and NAT is NOT
applied on the traffic. However, you need to obtain multiple public IP addresses (one for the
VSG and one for each computer) from your ISP before you can use this feature.

7.1.2 Server Configuration

Use the Server Configuration screen to set the embedded web server, the LAN DHCP server
and specify the e-mail server for e-mail redirection on the VSG.
Click System Settings and Server to display the screen as shown next.

Chapter 7 Server

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