Monitor Linux routers and firewalls with MRTG

    Date01 Aug 2002
    3349
    Posted ByAnthony Pell
    MRTG doesn't have all the bells and whistles of commercial monitoring software, but it does the job well and is definitely worth considering as part of your network monitoring activities. MRTG, or Multi Router Traffic Grapher, is a popular monitoring and . . . MRTG doesn't have all the bells and whistles of commercial monitoring software, but it does the job well and is definitely worth considering as part of your network monitoring activities. MRTG, or Multi Router Traffic Grapher, is a popular monitoring and statistics tool for use on Linux platforms. It was designed to monitor the traffic load on network links, but it's highly extensible and configurable. Not only can you watch interfaces on routers and switches, but you can also analyze Linux system variables. Although this is usually done with the Simple Network Management Protocol (SNMP), MRTG also supports the use of local scripts to feed it data. The data is then converted into HTML with graphs in PNG format for a visual representation of your network.

    MRTG is a powerful and extensible tool that will allow you to graph network links and system information over a configurable period of time. Utilizing SNMP, local scripts, or a combination of the two, MRTG allows you to easily monitor your devices. Such things as trends, traffic spikes, and slow periods are easy to detect with a visual representation. MRTG does this in excellent form, outputting data in HTML and PNG formats viewable through a Web browser. MRTG doesn't have all the bells and whistles of commercial monitoring software, but it does the job well and is definitely worth considering as part of your network monitoring activities.

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