book

CentOS 6 Linux Server Cookbook

by Jonathan Hobson

April 2013

Beginner

374 pages

8h 14m

English

Packt Publishing

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What this book covers

ErrataPiracyQuestions
Introduction
Getting readyHow to do it...How it works…See also
Getting readyHow to do it...How it works…See also
Getting readyHow to do it...How it works...See also
Getting readyHow to do it...How it works...See also
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...See also
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...
Introduction
Getting readyHow to do it...How it works...There's more...Linking time and location
Getting readyHow to do it...How it works...There's more...Synchronizing multiple machinesModifying the logfile's locationFudging timeSee also
Getting readyHow to do it...How it works...There's more...Substituting the Netmask value with a prefixFinding your HWADDR/MAC address
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...See also
Getting readyHow to do it...How it works...There's more...
Introduction
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...There's more...See also
Getting readyHow to do it...How it works...There's more...See also
Getting readyHow to do it...How it works...There's more...See also
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...There's more...
Introduction
Getting readyHow to do it...How it works...There's more...See also
Getting readyHow to do it...How it works...There's more...See also
Getting readyHow to do it...How it works...See also
Getting readyHow to do it...How it works...There's more...See also
Getting readyHow to do it...How it works...There's more...See also
Getting readyHow to do it...How it works...There's more...See also
Getting readyHow to do it...How it works...See also
Getting readyHow to do it...How it works...See also
Introduction
Getting readyHow to do it...How it works...There's more...Change the default timeout
Getting readyHow to do it...How it works...There's more...Changing the SSH port number of your serverLimiting SSH access by user or groupSee also
Getting readyHow to do it...How it works...There's more...Allowing an IP addressBanning an IP addressSee also
Getting readyHow to do it...How it works...There's more...See also
Getting readyHow to do it...How it works...There's more...Unblocking an IP addressSee also
Getting readyHow to do it...How it works...There's more...See also...
Introduction
Getting readyHow to do it...How it works...There's more...Disable printing support in SambaRelaxing the rules for SELinuxOpening the firewallAssigning the master browserSee also
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...There's more...Controlling access and enabling a write list for specific users or groupsEnabling guest-only access to a custom share folderSee also
Introduction
Getting readyHow to do it...How it works...There's more...Enabling access to a DNS server from behind a firewallCleaning expired recordsSee also
Getting readyHow to do it...How it works...See also
Getting readyHow to do it...How it works...There's more...See also
Getting readyHow to do it...How it works...See also
Getting readyHow to do it...How it works...See also
Getting readyHow to do it...How it works...See also
Getting readyHow to do it...How it works...See also
Introduction
Getting readyHow to do it...How it works...There's more...See also
Getting readyHow to do it...How it works...There's more...Reviewing and revoking permissions or dropping a userSee also
Getting readyHow to do it...How it works...There's more...Connecting to PostgreSQLAccessing a PostgreSQL database using psqlCreating a copy of a database in PostgreSQLSee also
Getting readyHow to do it...How it works...See also
Introduction
Getting readyHow to do it...How it works...There's more...See also
Getting readyHow to do it...How it works...There's more...Setting up e-mail softwareSee also
Getting readyHow to do it...How it works...There's more...Setting up e-mail software with SMTP authenticationSee also
Getting readyHow to do it...How it works...There's more...Setting up a catch-all e-mail address for a virtual domainSee also
Introduction
Getting readyHow to do it...How it works...There's more...Running a CGI/Perl scriptActivating ModPerl::PerlRunSee also
Getting readyHow to do it...How it works...See also
Getting readyHow to do it...How it works...There's more...Reinstating suexecSee also
Getting readyHow to do it...How it works...There's more...See also
Getting readyHow to do it...How it works...See also
Introduction
Getting readyHow to do it...How it works...There's more...Changing the default time-outBanning a user from the FTP serviceCustomizing the bannerSee also
Getting readyHow to do it...How it works...See also
Getting readyHow to do it...How it works...There's more...
Getting readyHow to do it...How it works...There's more...

Content preview from CentOS 6 Linux Server Cookbook

Chapter 5. Securing CentOS

In this chapter, we will cover:

Escalating user privilege with sudo
Hardening the secure shell environment
Configuring a firewall and working with IPTables
Protecting SSH with fail2ban
Preventing dictionary based attacks with DenyHosts
Running antivirus scans with ClamAV

Introduction

This chapter is a collection of recipes that provides a solid approach to providing your server with a safer and more secure environment by guiding you through the process of escalating user privilege with sudo; hardening the secure shell environment; configuring a firewall and working with IPTables; protecting SSH with fail2ban; preventing dictionary-based attacks with DenyHosts; and running antivirus scans with ClamAV.