David M Williams

David M Williams

David has been computing since 1984 where he instantly gravitated to the family Commodore 64. He completed a Bachelor of Computer Science degree from 1990 to 1992, commencing full-time employment as a systems analyst at the end of that year. David subsequently worked as a UNIX Systems Manager, Asia-Pacific technical specialist for an international software company, Business Analyst, IT Manager, and other roles. David has been the Chief Information Officer for national public companies since 2007, delivering IT knowledge and business acumen, seeking to transform the industries within which he works. David is also involved in the user group community, the Australian Computer Society technical advisory boards, and education.

Sunday, 12 August 2007 16:44

Hardening Linux

Linux is an enterprise-grade operating system and is capable of the utmost security. However, many installations fall short because the out-of-the-box setup routines have to cater for the lowest common denominator.
Monday, 06 August 2007 10:54

Run a Linux server farm for nix

One great thing about Linux is its rock-solid nature even when you load it up with as many daemons and services as you like. Yet, often “best practice” dictates you separate out some apps across a couple of servers or at the very least provide a safe development environment which is distinct from your production environment.
Thursday, 02 August 2007 18:43

Hack and crack proof SSH on Linux

It’s inevitable: if your computer is Internet-connected you will have people coming a-knockin’. Fortunately Linux users are more savvy than to think any keep-alive ping or other piece of Internet flotsam is a hack attempt. Even so, it’s simply a matter of time before your router’s lights flash heavily and /var/log/auth.log (/var/log/secure on RedHat) fills with chilling messages like these:

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