WorkDir: /var/www/mrtg Target[in_packets]: '/usr/local/mrtg/iptables-in' MaxBytes[in_packets]: 1500 Title[in_packets]: Inbound packets PageTop[in_packets]: Inbound Packet Stats This is similar to the configuration used for SNMP above; however, we are pointing the target to an external script called iptables-in. We are also setting a fairly arbitrary MaxBytes setting since we are dealing with packets as opposed to bits or bytes. This will vary from system to system and a few different values may need to be tried. Although this is a rather simple example, it should give you an idea of what is possible with MRTG. Any data you can gather via the command line can be imported into MRTG and graphed in real time. Running MRTG Once MRTG has been installed successfully, you will need to configure it to run on your system. MRTG can be run manually as follows: /usr/bin/mrtg /etc/mrtg.cfg MRTG updates its log files every time it is run. The first two times, all the files will not have been created and you may see errors. These can be ignored, but anything you see on the third time around will probably warrant closer investigation. It is a good idea to configure cron to run the program, as MRTG will need to execute often to poll devices and gather data. The standard interval is five minutes, but you can change it to fit your particular needs. Place an entry in /etc/crontab giving the interval, user to run as, path to mrtg, and the path to mrtg.cfg like this:
*/5 * * * * root /usr/bin/mrtg /etc/mrtg.cfg Once MRTG is configured and running, all you will need to do is access the pages through a Web browser. You may want to tweak the HTML manually to do such things as index multiple devices and enable auto-refresh. Summary 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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ur concept is good.
please give examples with ur concepts
thank u