Simple Network Management Protocol

Simple Network Management Protocol
Simple Network Management Protocol (SNMP) is an “Internet-standard protocol defined by the Internet Engineering Task Force (IETF) for monitoring and managing devices on IP networks.SNMP supported devices are routers, switches, servers, workstations, printers etc

An SNMP-managed network consists of three key components:

* Managed device
* Agent — software which runs on managed devices
* Network management system (NMS) — software which runs on the manager
Latest version is SNMPv3 provides security features like
Confidentiality – Encryption of packets to prevent snooping by an unauthorized source.
Integrity – Message integrity to ensure that a packet has not been tampered with in transit including an optional packet replay protection mechanism.
Authentication – to verify that the message is from a valid source.

Commands to check
——————
using command from client machine to check and retrieve informations

OID:object identifier consisting of numbers separated by decimal points (i.e., 1.3.6.1.4.1.2682.1).

snmpget

usages:snmpget [COMMON OPTIONS] [-Cf] OID [OID]
snmpget -c public hostname/ip system.sysDescr.0
(will retrieve the variable system.sysDescr.0 from the host  using the community string public)

snmpget -v1 -Cf -c public localhost 1.3.6.1.4.1.2021.4.5.0

snmpwalk

usages:snmpwalk [APPLICATION OPTIONS] [COMMON OPTIONS] [OID]
snmpwalk -Os -c public -v 1 localhost

Read my previous post how to install snmp on windows
https://teckadmin.wordpress.com/2011/04/09/installing-snmp-agent-on-windows/

Tool can be downloaded from
http://www.net-snmp.org/
http://www.elifulkerson.com/articles/net-snmp-windows-binary-unofficial.php
http://snmpwalk-windows-gui.fyxm.net/
http://snmp-walk-utility.qarchive.org/
http://www.solarwinds.com/products/freetools/snmp-enabler-for-windows/enable-snmp.aspx

References:
http://msdn.microsoft.com/en-us/library/aa379100%28v=vs.85%29.aspx
http://www.techrepublic.com/article/enable-snmp-in-windows-server-2003/6176828
http://www.loriotpro.com/ServiceAndSupport/How_to/InstallWXPAgent_EN.php

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Posted on September 2, 2011, in General, Monitoring Tools, Uncategorized. Bookmark the permalink. Leave a comment.

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