KEY EXPERIENCE The sys admin's daily grind: Single-packet authentication

Aug 26, 2008

Conventional, woodpecker-style port knocking is open to sniffing and brute force knocking attacks. Sending an encrypted packet with an access request to the server is safer and more modern. Learn more about Firewall Knock Operator, a.k.a. Fwknop.

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Grendel Scan 1.0: Automatic Security Check for Web Applications

Aug 13, 2008

Grendel Scan version 1.0, a Web application testing tools, was introduced at the Defcon Security Conference in Las Vegas.

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First Maintenance Update for Firefox 3

Jul 17, 2008

Mozilla has just released version 3.0.1 of the Firefox browser; the first maintenance update removes a couple of vulnerabilities and fixes a some minor bugs.

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Charly's Column The Sysadmin’s Daily Grind: FuzzyOCR

Jul 11, 2008

The latest trend is to hide spam in images. The admin’s response: an OCR tool that extracts the texts and feeds them to the spam filter.

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Tarpits Using tarpits to trap spammers

Jul 11, 2008

A tarpit slows down spam by reducing the effectiveness of the spammer’s weapons.

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Spam Test Comparing antispam appliances and services

Jul 11, 2008

Spam filters can help smooth the waves in your inbox, as long as they are reliable and don’t have too many side effects. We’ll show you what we found when we tested five antispam appliances and two service providers.

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Apache Suexec Secure scripts with Apache Suexec

Jun 20, 2008

For many admins, the security of a web application is more important than its performance. If you have a web server with multiple users, the Suexec module can help you avoid problems associated with globally writable directories.

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FoxFilter and Public Fox Firefox content filters

Feb 25, 2008

Firefox has a reputation of being the most innovative Web browser. We show you how to apply Firefox’s distribution-specific tools to make browsing the web safer for your children.

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