A proxy server provides safer and more efficient surfing. Although commercial proxy solutions are available, all you really need is Linux and an old PC in the attic.

A new form of phishing attack deposits an HTML tag on the vulnerable service to trap users into authenticating.

Content filters protect a web user’s privacy and keep the flood of unsolicited advertising at bay. We’ll show you a pair of popular Open Source content filters.

Thunderbird offers several options for secure email, and the GnuPG-based Enigmail encryption add-on provides an additional layer of protection.

The leading email applications include new features for helping users secure and authenticate their mail messages, but each tool has a different approach to handling tasks such as signing and encryption. This article describes how to add encryption and digital signatures to the Thunderbird, Kmail, and Evolution mail clients.

Even if you do not have a mail server of your own, SpamAssassin can help you filter out unsolicited junk mail. This article describes how SpamAssassin collaborates with Evolution and KMail. Thunderbird, on the other hand, has its own simple spam-detection feature.