OPEN SOURCE NETWORK MANAGEMENT TOOLS The Sixth Meeting

Overview Introduction NOC Philosophy Available Tools

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.”

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.

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

PURPOSE Policies Faults & Issues Configuration Management Accounting Communication Security Performance Monitoring NOCs are dedicated to monitoring and coordinating network operations. This requires that the following functional areas are addressed:

Multi Router Traffic Grapher (MRTG) AVAILABLE TOOLS Multi Router Traffic Grapher (MRTG) 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)

MRTG

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

Manajemen Jaringan, Sukiswo ST, MT

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)

Manajemen Jaringan, Sukiswo ST, MT

Manajemen Jaringan, Sukiswo ST, MT

Manajemen Jaringan, Sukiswo ST, MT

Manajemen Jaringan, Sukiswo ST, MT

Jaringan Telekomunikasi, Sukiswo ST, MT 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. ENMS also discovers and maps the physical and logical connections between these devices Layer 2 discovery, including Ethernet switches, interconnecting links, switch communities, VLANs, and VLAN membership Layer 3 discovery of network elements and interconnecting links Layer 4 - 7 discovery of Ethernet Routing Switch 8600 WSM network elements and interconnecting links End node discovery of devices such as servers and workstations attached to the network, including Communication Server 1000 IP telephony devices

Manajemen Jaringan, Sukiswo ST, MT

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

Manajemen Jaringan, Sukiswo ST, MT

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

Manajemen Jaringan, Sukiswo ST, MT

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

Request Tracker http://bestpractical.com/rt/ Tracks data/conversations/requests. Convenient for end users. Highly customizable. Easy to install (hmm…) Manajemen Jaringan, Sukiswo ST, MT

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… Manajemen Jaringan, Sukiswo ST, MT

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. Manajemen Jaringan, Sukiswo ST, MT