Chapter Ten: Implementing Internet Services Hands-On Novell NetWare 0 5, Enhanced Edition

Firewall Security

• Firewalls consist of software that runs on a server or specialized hardware, such as a network router, and can be configured to provide protection from external threats in the following ways:

• Enforce corporate security and access control policies by controlling the type of traffic permitted between the internal private network and the Internet

• Keep log files of information about external traffic to better monitor the source and frequency of unauthorized access attempts

• Provide a central point that all network traffic must pass through before reaching the internal private network

• Act as a traffic cop by permitting only selected services, such as FTP or WWW, to access the network

• Create firewall partitions that limit security breaches or prevent intruder attacks from spreading across the company intranet

• A firewall’s primary objective is to prevent entities on untrusted or unknown networks from accessing services and computers on the trusted or internal network

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