Measure the transaction response times of your web and application servers. Performing continuous passive monitoring of network traffic. Recording historical data of measurements in a backend database and presenting via a PHP/Jpgraph based web front-end.
PasTmon is a passive network traffic analyser that can measure user transaction response times of web, ftp, dns, irc, pop, mail, postgresql, and mysql database servers. You can even define your own signature rules to monitor custom TCP based applications. PasTmon is a server administrator's tool for measuring application performance and response times.
2. vnstat @ http://humdi.net/vnstat/
vnStat is a console-based network traffic monitor for Linux and BSD that keeps a log of network traffic for the selected interface(s). It uses the network interface statistics provided by the kernel as information source. This means that vnStat won't actually be sniffing any traffic and also ensures light use of system resources.
2. vnstat @ http://humdi.net/vnstat/
vnStat is a console-based network traffic monitor for Linux and BSD that keeps a log of network traffic for the selected interface(s). It uses the network interface statistics provided by the kernel as information source. This means that vnStat won't actually be sniffing any traffic and also ensures light use of system resources.
