TuxTraining

FreeBSD is a Unix-like free operating system. You can install to choose third party software on FreeBSD from the Ports Collection. Many services such as POP3 server daemons, IMAP, etc. could be started using the inetd.

However, networking can be stop or started using special script located in /etc/rc.d/ directory. This directory includes script to stop or start network, and other services such as SSH server.

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Snort is a Network Intrusion Detection System (NIDS), which can view and analyze packets on a network to determine whether or not a system is being attacked by remote.   Most Linux distributions come with Snort, so it’s simply a matter of installing Snort via urpmi, apt-get, or yum. If you’re like me and run a distro where Snort is not in the repo’s you can grab the source here.  Snort can write its collected information to a variety of different sources for later analysis, be it flat files or a database such as PostgreSQL or MySQL.

As well, Snort can be used as a simple packet logger, sniffer, or a full-blown NIDS.

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