Here's the service definition I use to monitor the bandwidth data that's stored in the log file. In my example, I'm monitoring one of the ports on a Linksys switch. You'll need to let the check_mrtgtraf plugin know what log file the MRTG data is being stored in, along with thresholds, etc. The check_mrtgtraf plugin (which is included in the Nagios plugins distribution) allows you to do this. If you're monitoring bandwidth usage on your switches or routers using MRTG, you can have Nagios alert you when traffic rates exceed thresholds you specify. Tip: You can usually find the OIDs that can be monitored on a switch by running the following command (replace 192.168.1.253 with the IP address of the switch):
There are a million things that can be monitored via SNMP, so its up to you to decide what you need and want to monitor. That's it for the SNMP monitoring example. The "-m RFC1213-MIB" is optional and tells the check_snmp plugin to only load the "RFC1213-MIB" instead of every single MIB that's installed on your system, which can help speed things up. The "-r 1" option tells the check_snmp plugin to return an OK state if "1" is found in the SNMP result (1 indicates an "up" state on the port) and CRITICAL if it isn't found. In the example above, the "-o ifOperStatus.1" refers to the OID for the operational status of port 1 on the switch. If you want to ensure that a specific port/interface on the switch is in an up state, you could add a service definition like this:Ĭheck_command check_snmp!-C public -o ifOperStatus.1 -r 1 -m RFC1213-MIB
In the check_command directive of the service definition above, the "-C public" tells the plugin that the SNMP community name to be used is "public" and the "-o sysUpTime.0" indicates which OID should be checked. Use generic-service Inherit values from a templateĬheck_command check_snmp!-C public -o sysUpTime.0 If it doesn't, skip this section.Īdd the following service definition to monitor the uptime of the switch. If your router is compatible, you'll get a firmware page that details what you need to download.If your switch or router supports SNMP, you can monitor a lot of information by using the check_snmp plugin. Go to this page and enter your router's model number.
VPN MONITOR DDWRT UPDATE
The first step is to get the firmware we'll need to update your router. They make some pretty great routers and the model below has gigabit Wi-Fi. We're going to be a bit vague here as the set up does vary by the exact router model you might have.Įasy Mode: You can pick up a Buffalo Router with DD-WRT pre-installed.
VPN MONITOR DDWRT FREE
If your router already has DD-WRT, feel free to skip ahead. 1. Installing DD-WRTīefore we can set up the VPN, we'll need to get your router running DD-WRT. If your router has VPN and DDNS support, that should be enough - you'll just have to adjust and approximate some of the upcoming steps.
Note: You don't specifically need DD-WRT.
Here's what you need to do in a step-by-step format. The process of setting up your own VPN server isn't trivial, but it isn't overly complex either. DD-WRT is an open source router firmware that grants you more control than most stock routers.
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