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Controlling File Access in Linux
- Details
- Written by Les Bell
- Category: Linux and Open Source
Because Linux is a multi-user system - whether operated stand-alone or as a network server, it becomes important to keep users' files separate and to enforce access controls to minimise either accidental or malicious damage to files. While this is obviously most useful in the corporate/academic world for which UNIX was designed, it is even useful in a home setting, as any parent of several squabbling children can attest!
L33t H4x0r Attacks 127.0.01
- Details
- Written by Les Bell
- Category: Infosec
I'm preserving this, since copies of it have been disappearing off the Internet. It's a transcript of what must be the world's dumbest hacker on an IRC channel. The comments are by the original poster, who is unfortunately no longer known.
SE221 - CISSP Fast Track Review V 2.0
- Details
- Written by Les Bell
- Category: Infosec
The Certified Information Systems Security Professional designation is the "gold standard" in professional security certifications. It confirms that the holder has several years' experience in two or more security-related domains and has passed a rigorous six-hour examination.
Dynamic DNS Updates with TSIG for Security
- Details
- Written by Les Bell
- Category: Networking and Data Communications
Many network administrators have eased their workload by switching to using a DHCP server to configure client machines. In most cases, these machines do not run any services, so other machines never want to contact them, and so the lack of a corresponding entry in the domain name service is not a problem.
However, there are times when a machine requires a valid entry in the DNS. Traditionally, DNS has been set up by creating entries - called resource records - in text files called zone files. A typical address record for a host would look like this:
alpha IN A 10.0.0.52
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