Nessus Vulnerability Scanner - Download

In computer security, Nessus is a proprietary comprehensive vulnerability scanning program. It is free of charge for personal use in a non-enterprise environment. Its goal is to detect potential vulnerabilities on the tested systems.

According to surveys done by sectools.org, Nessus is the world's most popular vulnerability scanner, taking first place in the 2000, 2003, and 2006 security tools survey. Tenable estimates that it is used by over 75,000 organizations worldwide.

Nessus allows scans for the following types of vulnerabilities:

Vulnerabilities that allow a remote hacker to control or access sensitive data on a system.

Misconfiguration (e.g. open mail relay, missing patches, etc.).

Default passwords, a few common passwords, and blank/absent passwords on some system accounts. Nessus can also call Hydra (an external tool) to launch a dictionary attack.

Denials of service against the TCP/IP stack by using mangled packets

Preparation for PCI DSS audits

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