D-Link DFL-500 user manual Introduction, NAT/Route mode and Transparent mode, About this document

Introduction

The DFL-500 Network Protection Gateway (NPG) is an easy-to-deploy and easy-to-administer solution that delivers exceptional value and performance for small

office and home office (SOHO) applications.

Your DFL-500 is a dedicated easily managed security device that delivers a full suite of capabilities that include firewall, VPN, traffic shaping, and web content filtering.

NAT/Route mode and Transparent mode

The DFL-500 can operate in NAT/Route mode or Transparent mode.

NAT/Route mode

In NAT/Route mode, the DFL-500 is installed as a privacy barrier between the internal network and the Internet. The firewall provides network address translation (NAT) to protect the internal private network. You can control whether firewall policies run in NAT mode or route mode. NAT mode policies route allowed connections between firewall interfaces, performing network address translation to hide addresses on the protected internal networks. Route mode policies route allowed connections between firewall interfaces without performing network address translation.

Transparent mode

Transparent Mode provides firewall protection to a pre-existing network with public addresses. The internal and external network interfaces of the DFL-500 NPG must be in the same subnet and the DFL-500 NPG can be inserted into your network at any point without the need to make any changes to your network.

About this document

This user manual describes how to install and configure the DFL-500 NPG. This document contains the following information:

•Getting started describes unpacking, mounting, and powering on the DFL-500 NPG.

•NAT/Route mode installation describes how to install the DFL-500 NPG if you are planning on running it in NAT/Route mode.

•Transparent mode installation describes how to install the DFL-500 NPG if you are planning on running it in Transparent mode.

•Firewall configuration describes how to configure firewall policies to enhance firewall protection.

•IPSec VPNs describes how to configure DFL-500 IPSec VPN.

•PPTP and L2TP VPNs describes how to configure PPTP and L2TP VPNs between the DFL-500 NPG and a Windows client.

•Web content filtering describes how to configure web content filters to prevent unwanted web content from passing through the DFL-500 NPG.

•Logging and reporting describes how to configure logging and reporting to track activity through the DFL-500 NPG.

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