Transcript SCADA (Supervisory Control And Data Acquisition)

Open Source Network
Management Tools
Sukiswo
[email protected]
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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
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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)
 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.
 This requires that the
following functional
areas are addressed:
Faults
&
Issues
Configuration
Management
Performance
Monitoring
Policies
Security
Management
Accounting
Communication
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MRTG
 Multi Router Traffic Grapher
 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
• A single instance of OpenNMS supports monitoring of a large
number of nodes.
– Automation
• OpenNMS minimizes the amount of manual configuration.
– Rule-based configuration
• Flexible rules can be used to specify what services are polled
on what devices.
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ZABBIX
 http://www.zabbix.com
 Functionalities
– 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
 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
 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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