Networks Administration and Management

Nmap (Network Mapper) is the most often used by network administrators and IT security professionals to scan corporate networks, looking for live hosts, specific services, or specific operating systems. This book provides comprehensive coverage of all Nmap features, including detailed, real-world case studies.

Network and system administration usually refers to the skill of keeping computers and networks running properly. But in truth, the skill needed is that of managing complexity. This book describes the science behind these complex systems, independent of the actual operating systems they work on.

Network and System Administration usually refers only to the traditional skills and recipes for keeping computers and networks running properly. But, in truth, this view omits the most important part of the system: humans. The skill needed to comprehend and tame systems comprising both humans and machines is that of managing complexity.

If you're an advanced security professional, then you know that the battle to protect online privacy continues to rage on. Security chat rooms, especially, are resounding with calls for vendors to take more responsibility to release products that are more secure. In fact, with all the information and code that is passed on a daily basis, it's a fight that may never end. Fortunately, there are a number of open source security tools that give you a leg up in the battle.

This book is all about what you can do to automatically manage vulnerabilities and keep your network safe from attack.

Nmap (Network Mapper) is the official guide to the Nmap Security Scanner, a free and open source utility used by millions of people for network discovery, administration, and security auditing. From explaining port scanning basics for novices to detailing low-level packet crafting methods used by advanced hackers, this book suits all levels of security and networking professionals. A reference guide documents every Nmap feature and option, while the rest of the book demonstrates how to apply those features to quickly solve real-world tasks. Examples and diagrams show actual communication on the wire.

Ever wonder which Nmap (Network Mapper) scan was the right one to use? Thirteen different Nmap scans are profiled, with advantages, disadvantages, and usage guidelines for each one. Each scan method includes graphical scan descriptions and packet-by-packet analysis! - Nmap's operating system fingerprinting can provide amazing detail about a remote device using only fourteen IP frames that never open an application session or log in.

This book provides the information necessary to troubleshoot many problems commonly encountered in internetworks using Cisco hardware and software products, enabling readers to diagnose and resolve specific problems common to every network type. It will help readers reduce downtime, improve network performance, and enhance network reliability using proven troubleshooting solutions. Readers will be able to make intelligent, timely, and cost-effective networking decisions for their networking environments. Each section of the book is devoted to problems common to a specific protocol or topology. Sections are subdivided into symptoms, descriptions of environments, diagnosing and isolating problem causes, and problem-solution summaries