Nessus WIP 01/09/99 – Latest release of Nessus – a security scanner that scans a given network, searching for vulnerabilities which could be exploited by some remote intruder. Excellent security auditing tool with a client/server architecture, over 180 plugins.
You can download it from the following link: https://packetstormsecurity.com/files/download/12952/nessus-unstable-010999.tgz
Source: https://packetstormsecurity.com/files/12952/nessus-unstable-010999.tgz.html