Certification Summary

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One of the basic functions of a Red Hat Enterprise Linux system administrator is to protect a Linux computer and a network from inside and outside attacks. RHEL 3 includes a variety of tools that can help you establish a secure computing environment.

RHEL 3 includes powerful tools for securing networks from outside attack. You can use centralized account management with an NIS service. Log files can be configured to collect data from any number of services. Pluggable Authentication Modules can help you configure how individual services verify usernames and passwords. The Extended Internet Services daemon, xinetd, governs the services configured through the /etc/xinetd.d directory.

With tcp_wrappers and iptables at your disposal, you can create a firewall which can protect your RHEL 3 system as well as the computers on your LAN. Firewalls require a computer with at least two network cards. Routing must be enabled on that computer. The firewall can include IP masquerading to hide the IP addresses of the computers inside your LAN.

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RCHE Red Hat Certified Engineer Linux Study Guide[c] Exam (Rh302)
RCHE Red Hat Certified Engineer Linux Study Guide[c] Exam (Rh302)
ISBN: 71765654
Year: 2003
Pages: 194

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