Chapter 22. Linux Firewalls
This chapter covers the following topics:
This chapter covers the following exam objectives:
Objective 3.5: Given a scenario, implement and configure Linux firewalls.
Objective 4.4: Given a scenario, analyze and troubleshoot application and hardware issues.
One of the major components of securing a system or network is keeping the “bad guys” out while letting the “good guys” have the access they need. This means you need to make sure that network access to your systems is secure and stable.
Firewalls enable you to allow or block network connections. A firewall can inspect each network packet and determine if the packet should be allowed in. In this chapter, ...
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