This book is a step-by-step tutorial with clear instructions and screenshots to guide you through the creation of a complete, cost-effective telephony system. You will start with installation, walk through the different features, and see how to manage and maintain the system. If you are an IT professional or

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This is a cookbook, with practical recipes providing tips and tricks to
the most common problems and scenarios faced with OpenVPN. This book is
ideal for system administrators and networking professionals who are
interested in building secure VPNs using OpenVPN. It is preferable that
the

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Over the past year there has been a shift within the computer security world away from passive, reactive defense towards more aggressive, proactive countermeasures. Although such tactics are extremely controversial, many security professionals are reaching into the dark side of their tool box to identify, target, and suppress their

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It’s official: with IPv4 network addresses close to depletion, moving to IPv6 is now business critical. This concise book helps you plan for IPv6 integration by providing a high-level overview of the technical—and nontechnical—steps involved. Many of the challenges for your enterprise are on the organizational level,

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This is a fast-paced Beginner’s Guide that will take you step by step through the fundamentals of FreeRADIUS and using it in your live projects. It has been structured in a way that will let you get maximum practical information out of it in setting up your own

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With ever-increasing demands on capacity, quality of service, speed, and reliability, current Internet systems are under strain and under review. Combining contributions from experts in the field, this book captures the most recent and innovative designs, architectures, protocols, and mechanisms that will enable researchers to successfully build the

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Ying-Dar Lin, Ren-Hung Hwang, and Fred Baker’s Computer Networks: An Open Source Approach is the first text to implement an open source approach, discussing the network layers, their applications, and the implementation issues. The book features 56 open-source code examples to narrow the gap between domain knowledge and

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