Book Image

Cacti 0.8 Network Monitoring

Book Image

Cacti 0.8 Network Monitoring

Overview of this book

Cacti is a network monitoring tool that provides graphic solutions to your everyday monitoring issues. It has a wide variety of features and misusing them can mean that you are not monitoring your network as closely as you think. This book takes you through all of the key features of Cacti and shows how to use them for maximum effectiveness. This book will teach you how to use Cacti effectively to monitor your network through its web interface leaving aside all the heavy chunks of code. You will be introduced to all the features of Cacti in an easy-to-understand format. This book introduces Cacti and goes through its complete installation and setup. After a quick look, it will teach you to use Cacti's amazing graph templating and user management features. You will learn to customize graphs and make them better looking and easier to understand. It will teach you to provide the paths to any external script or command using Cacti. Then it will take you through importing and managing new templates and also customizing them. Creating users and assigning permissions to them is the next step in this book. Towards the end, you will learn to take backups and restore the system.
Table of Contents (13 chapters)

Comparison of SNMP versions and security


Currently, there are three versions of SNMP: SNMP v1, SNMP v2, and SNMP v3. Version 1 and 2 have a number of features in common, but SNMP v2 offers enhancements—such as additional protocol and 64-bit high capacity counter for high-speed interface. SNMP v3 adds security and remote configuration capabilities to the previous versions.

SNMP v1 works over protocols such as UDP, IP, OSI Connectionless Network Service (CLNS), AppleTalk Datagram-Delivery Protocol (DDP), and Novell Internet Packet Exchange (IPX). SNMP v1 is widely used and is the de facto network management protocol in the internet community.

Request/response behavior of SNMP is implemented by using four protocol operations—Get, GetNext, Set, and Trap.

  • 'Get' operation is used by managing the system to retrieve the value of one or more instance from an agent. If the agent responding to the Get operation cannot provide values of all objectfg fd instances in a list, it does not provide...