ZyXEL Communications ZyXEL Vantage VSG-1000 - Manual (Page 22)

VSG-1000 Vantage Service Gateway
1-2 Getting to Know Your VSG
E-mail Forwarding
The VSG is able to forward and retrieve e-mail messages when the subscriber’s default email server is down or
behind a firewall.
DNS Proxy
With DNS proxy, the VSG provides DNS redirection when a subscriber’s configured DNS server is behind a
firewall or located in a private Intranet.
NAT (Network Address Translation)
NAT (RFC 1631) is the translation of the IP address of a host in a packet, for example, the source address of an
outgoing packet, used within one network to a different IP address known within another network.
The VSG automatically performs NAT on the LAN. You may also set the VSG to perform NAT on the WAN for
VPN (IPSec and PPTP) connections.
Subscriber Login Page Customization
You can customize the subscriber login page according to your business needs. The advanced settings allows you to
include welcome messages, company logo and basic formatting.
Local Console Management
The VSG provides a console port for local management.
Web Configurator Management
The VSG comes with an embedded web-based configurator. It offers advanced management features and allows
you to manage the VSG remotely using Internet Explorer (version 5.0 or above) or Netscape Navigator (version 6.0
or above).
Upgrade Firmware via the WAN or Console Port
The firmware of the VSG can be upgraded via the WAN or the console port.
Ease of Installation
Your VSG is designed for quick, intuitive and easy installation. It can be mounted on a desktop or standard 19”
rack.
1.3 Applications
The following sections describe network application examples in which the VSG is used.
1.3.1 Internet Access for LAN Networks
With a broadband service account set up, the VSG allows the attached computers to enjoy high speed Internet
access.
Figure 1-1 Application: Internet Access for LAN Networks