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Practical Linux Infrastructure by Syed Ali

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CHAPTER 9

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Log Collection, OpenVPN, and iptables

This chapter covers three topics related to security: log collection, virtual private networks (VPNs), and firewalls. Log collection and analysis is an integral part of an effective infrastructure support strategy. OpenVPN enables secure VPNs and iptables is a fast and powerful firewall built into Linux.

Why Collect Logs?

Log management is a crucial component of infrastructure engineering. Logs are generated from numerous sources, such as applications, operating systems, networks, system devices, and services. Logs can be useful for the following:

  • Troubleshooting applications: Log files are the first ...

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