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Introduction to Firewalls


Anyone who needs to know and understand the workings of firewall technology, from a security or audit standpoint, should attend this course. If you come from one of these business areas, you would find the course very useful:

  • IT systems implementer wishing to protect vulnerable systems.
  • IT manager wishing to understand why the purchase of firewalling is necessary and what is involved.
  • Senior user or system owner wishing to understand ways of mitigating risk.
  • Network analyst looking to understand options for firewall protection.
  • Computer auditors and computer audit planners.
  • Computer security specialists.
  • Business risk analysts.

Learning Objectives

This course will enable you to understand the workings of firewall technology, from a security or audit standpoint. The IT technical components will be explained to you, so you will understand how the various elements work together.


Delegates should have a reasonable knowledge of IT in general. You should feel comfortable investigating system settings through a Windows GUI interface, as well as entering line commands in console environments. Some investigations may be carried out on a UNIX platform. The course has technical content, but this is technically in breadth, rather than depth.

Course Content

What are we protecting ourselves against?
Which persons are the threat?
What do we have that anyone would wish to violate?

Communications Protocols Used on the Internet
TCP/IP mechanism
Ports and services
Network services
Intruder techniques
Port scanning and detection
TCP/IP based threats

Harvesting Information
What intruders are looking for
Tools of the trade
Attack signatures

Introducing Encryption
Business objectives
Types of encryption
Virtual private networks

Traffic Control
Application level filtering and proxy services

System Security Checks
Top IT-based vulnerabilities

Optional Topics
Checkpoint firewall audit
Firewall audit (general)

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