Next to each entry is a check box that controls whether the service is trusted, and as such whether or not the corresponding TCP/IP port is open to traffic on the firewall or not (such as port 80 for a web server).Ī summary of the primary services is as follows: The main area of the Security Level Configuration tool consists of a list of TCP/IP based services. This chapter will cover the steps necessary to configure an RHEL 5 firewall using those tools. If you would like to learn about iptables we recommend Linux Firewall Configuration - Packet Filtering and iptables which can be found online at:įortunately RHEL 5 also provides some tools that make firewall configuration easy for the average user. Entire books can, and indeed have, been written about configuring iptables. In keeping with other Linux distributions, Red Hat Enterprise Linux 5 is supplied with powerful firewall technology known as iptables built-in.
Similarly, any internal network must have some form of firewall between it and an external internet connection. Any computer connected directly to an internet connection must run a firewall to protect against malicious activity.
Red Hat Enterprise Linux 8 Essentials Print and eBook (ePub/PDF/Kindle) editions contain 31 chapters and over 250 pagesĪ firewall is a vital component in protecting a computer system, or network of computers from external attack (typically from attack via an internet connection). Purchase the fully updated Red Hat Enterprise Linux 8 (RHEL 8) Edition of this publication in eBook ($9.99) or Print ($36.99) format You are reading a sample chapter from the RHEL 5 Edition book.
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