INDEX   TOC
Introduction
Product Overview
Settings and Administration
ADSL
SIP Support
  SIP Overview
  SIP and
  The SIP Server
  SIP Configuration
Security
Firewall Administration
Troubleshooting

Firewall Overview

What is a firewall?

The firewall works like a barrier that keeps destructive forces away from your computers. It guarantees that only allowed traffic passes in and out between the two networks.

How does a firewall protect?

The firewall examines all communication passing through and maps it with its defined security rules. The rules based on the senders address, receiving address, and which protocol and ports used.

Even the way the communication is carried out, the protocol, is examined, which prevents that badly implemented applications on secure servers goes down if they receive unexpected data.

Related Topics:

Firewall Overview
Firewall Technologies