article

Important Preface! This document bases on information and testing done with IIS 1.0. We have not re-tried it with later versions. However, we feel very comfortable with the information contained herein and think that it still is correct. There is just one exception: if you create an application in MMC under IIS 4.0, your ISAPI […]

By Rainer Gerhards Why care about Password Attacks Windows servers and workstations have become a primary target for malicious users. Be it hackers that try to deface a web site, the Warez community in search for “free” FTP server space or just your internal users interest in restricted files. One common thing about them is […]

By Rainer Gerhards In this article, I analyze why the SQL Slammer worm was so successful in bringing down the Internet – and what can be learned from the attack. I will not analyze how the worm worked in detail. There are already a number of good analyses out; please see the links section, especially […]

Article created 2001-04-03 by Rainer Gerhards. Did you ever run out of disk space on an important machine? Never? Well, I’ve done so and experienced all the headaches that come along with this situation. In this article, I describe how I implemented a basic automatic monitor system with the help of a little scripting. Why […]

Created 2001-04-01 Rainer Gerhards.  If a Windows 2000 server with Active Directory is installed using the standard setup, often no DNS resolution for Internet addresses will fail. This ultimately results in lost Internet connectivity. The reason are some defaults in the Active Directory wizards. Background Active Directory absolutely needs a working DNS to function correctly […]

Created by Rainer Gerhards. Updated by  Rainer Gerhards. Microsoft’s Active Directory relies heavily on DNS. DNS is used to find important resources like domain controllers. Because these in turn are needed to authenticate users. Windows will not work properly without a correctly configured DNS. Unfortunately, Microsoft has decided to use very new standards in it’s […]

Article created 2001-03-12 by Rainer Gerhards. Unicode is a standard to encode all of the world’s languages correctly on computers. In this article, Rainer Gerhards explains what Unicode is and why Adiscon bases all of its products on the Unicode standard. What is Unicode? It is an international standard. Its goal is to resolve ambiguities […]

Article created by Rainer Gerhards. Many system administrators are running Unix / Linux based monitoring and alerting for a long term. The basic idea behind a successful monitoring and alerting system is to centralize all system events at a single monitoring station. Once the information is centralized, it can be used to build an alerting […]