This is a detailed guide to the Domain Name System, its implementation, configuration, and administration. It covers the basics as well as the more advanced features and uses of DNS. It describes the basic DNS protocol and its extensions; DNS delegation and registration, including for reverse domains; using DNS servers in networks that are not connected to the internet; and using DNS servers on firewall machines. Many detailed examples are used throughout the book to show perform various configuration and administration tasks. This book is for system administrators and network architects who need to learn how to run and configure DNS servers. A working knowledge of TCP/IP protocols is presumed. The Domain Name System is one of the foundations of the internet.

The book is a guide to Network admins who are interested in extracting full potential of FreeBSD. Security—one of everlasting concerns in the IT industry—can be tackled very effectively in FreeBSD. How do you do it? Read the book and find out. You can then move on to learn intricacies of FreeBSD. Just tweak a few parameters to make the network suit your environment.

This book is a comprehensive guide to using Openswan for building both basic and industry size, military strength VPNs for medium to very large organizations. Written by the core developers, this practical book is all you need to use Openswan to build any VPN infrastructure you may need. The authors have covered the latest developments and upcoming issues. This book will not only help you build the VPN you need, but also save you a lot of time. With the widespread use of wireless and the integration of VPN capabilities in most modern laptops, PDA’s and mobile phones, there is a growing desire for encrypting more and more communications to prevent eavesdropping. Can you trust the coffee shop’s wireless network? Is your neighbor watching your wireless? Or are your competitors perhaps engaged in industrial espionage? Do you need to send information back to your office while on the road or on board a ship? Or do you just want to securely access your MP3’s at home? IPsec is the industry standard for encrypted communication, and Openswan is the de-facto implementation of IPsec for Linux.

TrixBox is a telephone system based on the popular open source Asterisk PBX (Private Branch eXchange) Software. TrixBox allows an individual or organization to setup a telephone system with traditional telephone networks as well as Internet based telephony or VoIP (Voice over Internet Protocol). SugarCRM is already integrated with Asterisk, hence it has been bundled with Trixbox too to increase flexibility. This book guides the reader in the setup of this system and how to manage the telephone system. The book begins by introducing telephony concepts before detailing how to plan a telephone system and moving on to the installation, configuration, and management of a feature packed PBX. This book provides examples of a well laid out telephone system with accompanying spreadsheets to aid the reader in building stable telephony infrastructure.

This practical introduction to OpenLDAP for Application Developers emphasizes how to get things done, going into Lightweight Directory Access Protocol (LDAP) theory only to answer practical questions. It demystifies OpenLDAP, providing a solid understanding of how to use its directory and covering building directory services, integrating directory services, and developing directory-enabled PHP or Python applications. Readers need only basic Linux system administration experience, not LDAP experience. Open-source OpenLDAP directory server is included in all major Linux distributions; many open-source and proprietary applications can use OpenLDAP’s services. Client applications use LDAP to connect to OpenLDAP, search the directory, and (if authorized) modify and manipulate records. Most often used to provide network-based authentication services for users, LDAP servers have many other uses: address book, DNS database, organizational tool, even network object store for applications.

This redbook identifies some of the basic design aspects of IP networks and explains how to deal with them when implementing new IP networks or redesigning existing IP networks. This project focuses on internetwork and transport layer issues such as address and name management, routing, network management, security, load balancing and performance, design impacts of the underlying networking hardware, remote access, quality of service, and platform-specific issues. Application design aspects, such as e-mail, gateways, Web integration, etc., are discussed briefly where they influence the design of an IP network.

After a general discussion of the aforementioned design areas, this redbook provides three examples for IP network design, depicting a small, medium and large network. You are taken through the steps of the design and the reasoning as to why things are shown one way instead of another. Of course, every network is different and therefore these examples are not intended to generalize. Their main purpose is to illustrate a systematic approach to an IP network design given a specific set of requirements, expectations, technologies and budgets.

An essential one-stop resource-nine convenient minibooks in a single 840page volume-for network administrators everywhere
This value-priced package includes sections on networking basics, building a network, network administration, TCP/IP and the Internet, wireless and home networking, Windows 2000 and 2003 servers, NetWare 6, Linux networking, and
Mac OS X networking
Written by the author of the perennial bestseller Networking For Dummies (0-7645-1677-9), this massive reference covers all the topics that administrators routinely handle
Provides key information, explanations, and procedures for configuration, Internet connectivity, security, and wireless options on today’s most popular networking platforms

Even if you aren’t a networking professional, Upgrading and Repairing Networks explains those tough networking concepts in a way that won’t make you reach for a bottle of aspirin, starting with the fundamentals and working through more advanced concepts. Now in its fourth edition, this industry classic networking reference gives you real world, in-depth explanations of confusing networking architectures and protocols, and helps you track down and repair networking problems that are costing you and/or your company money - right now. Don’t be the only networking professional caught in a network meltdown without a copy of this trusty tome at your side.

Your Guide to Easy and Secure Windows Vista Networking is a complete beginner’s guide to creating, configuring, administering, and using a small network using Windows Vista computers.Inside you’ll find comprehensive coverage of networking hardware, including Ethernet (wired) hardware (from NICs to cables to switches to routers) and wireless Hardware–from wireless NICs to access points to range extenders. We include handy “buyer’s guides” that tell you how to make smart choices when purchasing network hardware. With hardware in hand, we then show you how to roll up your shirtsleeves and put everything together, including configuring a router, laying cable, and connecting the devices.

Squid is the most popular Web caching software in use today, and it works on a variety of platforms including Linux, FreeBSD, and Windows. Squid improves network performance by reducing the amount of bandwidth used when surfing the Web. It makes web pages load faster and can even reduce the load on your web server. By caching and reusing popular web content, Squid allows you to get by with smaller network connections. It also protects the host on your internal network by acting as a firewall and proxying your internal web traffic. You can use Squid to collect statistics about the traffic on your network, prevent users from visiting inappropriate web sites at work or school, ensure that only authorized users can surf the Internet, and enhance your privacy by filtering sensitive information from web requests. Companies, schools, libraries, and organizations that use web-caching proxies can look forward to a multitude of benefits.