nessus

nessus.org 

The Nessus™ vulnerability scanner, is the world-leader in active scanners, featuring high speed discovery, configuration auditing, asset profiling, sensitive data discovery and vulnerability analysis of your security posture. Nessus scanners can be distributed throughout an entire enterprise, inside DMZs, and across physically separate networks.

When Nessus is managed with Tenable’s Security Center, an enterprise can perform full life-cycle vulnerability and configuration management. Organizations can communicate recommendations to the responsible parties, track remediations, and verify security patches and required configurations.

Nessus is supported by a world renowned research team and has the largest vulnerability knowledge base, making it suitable for even the most complex environments.

Nagios

nagios.org

Nagios is a host and service monitor designed to inform you of network problems before your clients, end-users or managers do. It has been designed to run under the Linux operating system, but works fine under most *NIX variants as well. The monitoring daemon runs intermittent checks on hosts and services you specify using external “plugins” which return status information to Nagios. When problems are encountered, the daemon can send notifications out to administrative contacts in a variety of different ways (email, instant message, SMS, etc.). Current status information, historical logs, and reports can all be accessed via a web browser.

Features