Netdefendos Overview; Features - D-Link DFL-260E User Manual

Network security firewall netdefendos version 2.27.03
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Chapter 1. NetDefendOS Overview
This chapter outlines the key features of NetDefendOS.
• Features, page 16
• NetDefendOS Architecture, page 19
• NetDefendOS State Engine Packet Flow, page 23

1.1. Features

D-Link NetDefendOS is the base software engine that drives and controls the range of NetDefend
Firewall hardware products.
NetDefendOS as a Network Security Operating System
Designed as a network security operating system, NetDefendOS features high throughput
performance with high reliability plus super-granular control. In contrast to products built on top of
standard operating systems such as Unix or Microsoft Windows, NetDefendOS offers seamless
integration of all its subsystems, in-depth administrative control of all functionality, as well as a
minimal attack surface which helps to negate the risk from security attacks.
NetDefendOS Objects
From the administrator's perspective the conceptual approach of NetDefendOS is to visualize
operations through a set of logical building blocks or objects. These objects allow the configuration
of NetDefendOS in an almost limitless number of different ways. This granular control allows the
administrator to meet the requirements of the most demanding network security scenarios.
Key Features
NetDefendOS has an extensive feature set. The list below presents the key features of the product:
IP Routing
Firewalling Policies
Address Translation
NetDefendOS provides a variety of options for IP routing
including static routing, dynamic routing, as well as multicast
routing capabilities. In addition, NetDefendOS supports
features such as Virtual LANs, Route Monitoring, Proxy ARP
and Transparency. For more information, please see
Chapter 4, Routing.
NetDefendOS provides stateful inspection-based firewalling
for a wide range of protocols such as TCP, UDP and ICMP.
The administrator can define detailed firewalling policies
based on source/destination network/interface, protocol,
ports, user credentials, time-of-day and more. Section 3.5, "IP
Rule Sets", describes how to set up these policies to
determine
what
traffic
NetDefendOS.
For functionality as well as security reasons, NetDefendOS
supports policy-based address translation. Dynamic Address
Translation (NAT) as well as Static Address Translation
(SAT) is supported, and resolves most types of address
translation needs. This feature is covered in Chapter 7,
Address Translation.
16
is
allowed
or
rejected
by

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