Transcript Create an Office Mix

OPEN SOURCE NETWORK
MANAGEMENT TOOLS
The Sixth Meeting
Overview
Introduction
NOC Philosophy
Available Tools
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INTRODUCTION
Wikipedia: “A network operations center (or NOC,
pronounced “nock”) is one or more locations from which
control is exercised over a computer, television broadcast, or
telecommunications network.”
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FUNCTIONS OF A NOC
 Responsible for monitoring the network for alarms or adverse
conditions (e.g. power failures, link failure)
 NOC staff analyze problems, troubleshooting, collaborate
with other technicians on site.
 NOC tracks issues/problems until they are resolved.
 Problems not solved within a specified time frame can be
escalated to the appropriate personnel.
 Standard Operating Procedures exists that detail how to
remedy issues/problems.
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NOC PHILOSOPHY
 (Adapted from RedHat documentation)
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Automate everything
Document everything
Communicate as much as possible
Know your resources
Know your users
Know your business
Security cannot be an afterthought
Plan ahead
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PURPOSE
 NOCs are dedicated to
monitoring and coordinating
network operations.
Faults
&
Issues
Performance
Monitoring
Configuration
Management
Policies
 This requires that the
following functional areas
are addressed:
Security
Management
Accounting
Communicati
on
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AVAILABLE TOOLS
Multi Router Traffic Grapher (MRTG)
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http://oss.oetiker.ch/mrtg/
Based on SNMP
Used to monitor traffic load on network links.
Many hacks exist to allow you to monitor other
things (e.g. incoming / outgoing emails, cache hits
and misses)
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MRTG
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Weathermap 4RRD
 Generates network weather maps.
 Shows the network link utilization on the network map by
color scheme
 Data used to create graph are acquired from RRDTool
databases or MRTG HTML files
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Nagios
 http://www.nagios.org/
 an enterprise-class network and server monitoring
system.
 Useful for:
 Monitoring of network services.
 Monitoring of host resources (processor load, disk usage, system
logs)
 Contact notifications when service or host problems occur and get
resolved (via e-mail, SMS).
 You can define event handlers that execute when triggered by certain
events. (Proactive problem resolution)
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OpenNMS
 http://www.opennms.org
 Functionalities
 High performance
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A single instance of OpenNMS supports monitoring of a
large number of nodes.
 Automation
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OpenNMS minimizes the amount of manual configuration.
 Rule-based configuration
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Flexible rules can be used to specify what services are
polled on what devices.
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ZABBIX
 http://www.zabbix.com
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Performance monitoring
User alerts
Monitoring of log files
Logging services
Capacity planning
Assuring and monitoring of SLA
High level view of IT resources and services
Graphical representation of collected information
Network maps
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Cacti
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http://www.cacti.net
Similar to MRTG.
Based on RRDtool.
Offers excellent graphing capabilities.
Has extensive templates.
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NTop
 http://ntop.org
 Network probe that shows network activity just
like “top”.
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Request Tracker
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http://bestpractical.com/rt/
Tracks data/conversations/requests.
Convenient for end users.
Highly customizable.
Easy to install (hmm…)
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Security Tools
 Some security tools to consider:
NetFilter IP Tables – Firewall
WireShark – Protocol analyzer
Snort – Intrusion detection
Netcat – Feature rich tool. Great for debugging.
Nessus – Vulnerability scanner
Many many more…
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Recommended Reading
 Practice of System and Network administration by
Thomas A. Limoncelli
 How to accelerate your Internet E-book http://bwmo.net/
 Red Hat Linux Network Management Tools (CD-ROM
included) (Paperback) By Steven Maxwell.
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