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[2003-07-31] Windows 2000 ICS, NAT, and IAS
A service first provided by Microsoft in its Windows 98 operating system, Internet Connection sharing is meant to allow a single Internet connection to be shared amongst multiple computers on a small network with minimal configuration. In Windows 2000, ICS is implemented via the actual sharing of a network interface, which has a ‘real' IP address, either via a dial-up or fixed network connection. It is important to remember that ICS (which is available in both Windows 2000 Professional and Server) is mainly meant as a solution for small and home offices, and not larger enterprise environments.
[2003-07-16] An Alternative to Perl: Shell Scripting With PHP
I know that you all want to get rid of Perl Scripts because of their complexity and the fact that Perl is not an easy language to learn. With the introduction of PHP version 4.2, PHP has started supporting a new SAPI (Server Application Programming Interface) called CLI (Command Line Interface). This facility was introduced to help developers create small shell application (scripts) with PHP, meaning that you can kiss Perl goodbye forever!
[2003-07-16] Operating System Concepts
The CPU (Central Processing Unit) is the heart of any computer, but the operating system is the brain. Unfortunately, understanding exactly how these things really work can be difficult, because it's fairly hard to "play" with the operating system that you are actually using. You can do quite a bit with sophisticated debuggers, but eventually you run into confusion and difficulty.
[2003-07-15] Security Trends
You set up firewalls, e-mail filtering, Intrusion Detection Systems (IDS), personal firewalls, Censor Software (both on network and personal level) and they still get in. What I'm referring to are those pesky VBSes, similar worms inhibiting the Windows platform right now and maybe a few real life crackers here and there. For the network administrator, this can be a real problem. Even when he has secured his network with the latest tools and patches, there is still a big chance of his kingdom getting infected, especially if it's made up of MS Windows machines, and its trusting users.
[2003-07-07] Authenticating by Public Key (OpenSSH)
SSH is a protocol for secure, remote logins and file copying; and OpenSSH, provided with most Linux distributions, is its most popular implementation. This recipe, selected from Chapter 6 on "Protecting Outgoing Network Connections," shows you how to use public-key authentication to prove your identity to a remote OpenSSH server, a technique more secure than using login passwords.
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