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Open Source Network Management Tools

Open Source Network Management Tools. Bruce Zamaere bsiza@kth.se. Overview. Introduction NOC Philosophy Available Tools. introduction.

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Open Source Network Management Tools

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  1. Open Source Network Management Tools Bruce Zamaere bsiza@kth.se

  2. Overview • Introduction • NOC Philosophy • Available Tools

  3. 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.”

  4. 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.

  5. 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

  6. Purpose • NOCs are dedicated to monitoring and coordinating network operations. • This requires that the following functional areas are addressed:

  7. 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)

  8. 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

  9. 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)

  10. 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.

  11. 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

  12. Cacti • http://www.cacti.net • Similar to MRTG. • Based on RRDtool. • Offers excellent graphing capabilities. • Has extensive templates.

  13. NTop • http://ntop.org • Network probe that shows network activity just like “top”.

  14. Request Tracker • http://bestpractical.com/rt/ • Tracks data/conversations/requests. • Convenient for end users. • Highly customizable. • Easy to install (hmm…)

  15. 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…

  16. 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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