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====== Gateway monitoring ======

===== Monit daemon =====

Monit is an open source supervision tool. It can monitor daemons, system resources, remote hosts or programs. It is recommended to use monit to monitor your applications. Please see [[https://mmonit.com/monit/|online documentation]].

The command ''monit status'' returns the status of all supervised services. Services can be started/stopped with monit using the commands ''monit start <name>'' and ''monit stop <name>''.

The monit configuration is made in the directory **''/etc/monit.d''**. It is a directory in which you have to add small scripts to describe what you want to do accordingly to monit specification.

===== Watchdog =====

Watchdog is handled by monit daemon. 

===== SNMP agent =====

Simple Network Management Protocol (SNMP) is a protocol used for monitoring network equipments. The data SNMP management is organized in a management information base (MIB). SNMP agent on Kerlink gateways is based on net-snmp (Net-SNMP). It is included by default with the firmware, and started automatically.

<note warning>
Check your **[[wiki:firewall|firewall]]** and note that SNMP ports should be opened to properly work!
</note>

To disable ''SNMPD'' from running at startup use the following commands:

<code>
echo SNMPDRUN=no > /etc/default/snmpd
reboot 
</code>
===== Supported MIBs =====

The following MIBs are supported:\\
  * mib2 (RFC1213)
//mibII/vacm_conf\\
mibII/tcpTable\\
mibII/udpTable\\
mibII/system//
  * if-mib
//if-mib/ifTable\\
if-mib/ifTable/ifTable\\
if-mib/ifTable/ifTable_interface//

For more information, see [[http://net-snmp.sourceforge.net/|Net-SNMP]].

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