Net-SNMP provides tools and libraries relating to the Simple Network Management Protocol including: An extensible agent, An SNMP library, tools to request or set information from SNMP agents, tools to generate and handle SNMP traps, etc.

SNMP, at its core, allows a management station to treat its network as a distributed database of health and configuration information (and much more). It's an IETF standardized protocol and "should" work the same way across every implementation.

The Net-SNMP agent is able to load the Windows SNMP service extension DLLs by using the Net-SNMP winExtDLL extension.

The Windows SNMP service must be installed, but the service must be disabled. This is required so that the extension DLLs are available for loading, and also because this extension and the existing Windows extensions use the Windows SNMP API from snmpapi.dll. An alternative to winExtDLL is to proxy requests from Net-SNMP to the Windows SNMP service. See the section 'Co-existence with Microsoft SNMP services'.

When installing Net-SNMP using the binary available from the web site, select
'With Windows Extension DLL support' for the 'Net-SNMP Agent Service'.

The recommended way to start snmpd is with the following command line:

snmpd.exe -I-udp,udpTable,tcp,tcpTable,icmp,ip,interfaces,system_mib,sysORTable

The above command will exclude all the Net-SNMP extensions that overlap with the default Windows (2003) extensions included with Windows. Other Net-SNMP modules take precedence over the modules loaded by winExtDLL.

The binary install of Net-SNMP includes shortcuts in the Start menu for registering and unregistering snmpd and snmptrapd as a service with the correct command line options.

The license of this software is Free, you can free download and free use this network utility software.