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Snort provides you with a high-performance, yet lightweight and flexible rule-based network intrusion detection and prevention system that can also be used as a packet sniffer and logger. With its advanced capabilities and reliability, it is the most deployed IDS / IPS software, widely used in network monitoring applications. The application can be used as a packet sniffer and logger, monitoring the network traffic in real-time, displaying the TCP/IP packet headers and recording the packets to a logging directory or a database (MySQL, Oracle, Microsoft SQL Server, and ODBC are supported). However, the real power of Snort resides in its intrusion detection capabilities, since it can analyze network traffic and warn you about unusual events, vulnerabilities or exploits.

The user customizable rules are similar to a firewall application and define the behavior of Snort in the IDS mode. You can set them up by editing the configuration file, which can also include application-specific rules (for SMTP e-mail connections, SSH and so on). Snort benefits from large community support with significant contribution to the rule database, which guarantees its reliability. Whether you use it for real-time traffic analysis and logging or as an IDS / IPS appliance, it is a powerful network security tool that professional users are surely to appreciate.