Installation guide

Medical Practice Network Security - Firewall Tutorial

INTRODUCTION 4

About this tutorial 4

What are firewalls? 4

Why do you need them? 4

What other computer security do you need? 5

What if your ISP already provides a firewall? 6

Firewall implementation issues 7

Do you have the necessary IT skills in-house? 7

STEP 1: Understanding firewalls in principle 8

STEP 2: Understanding how the Internet works 9

STEP 3: Deciding which firewall product you need 11

STEP 4: Understanding firewall technologies 14

STEP 5: Understanding different types of firewalls 15

STEP 6: Understanding network addressing 18

STEP 7: Understanding ports and firewall configuration 20

STEP 8: Suggested firewall products 22

STEP 9: Principles of firewall configuration 25

STEP 10: DIY security audits 26

STEP 11: How to audit your firewall - step by step 30

STEP 12: Firewall checklists - after installation 37

FURTHER INFORMATION 38

Virtual Private Network 38

Failover/load balancing 40

GLOSSARY 42