Firewalls are typically implemented as routers,but it doesn’t have to be that way. Bridging packet filters have a number of advantages,and you can add them to your network at a later stage without changing the configuration of your network components.

When you’re going wireless,it pays to be careful. Get the right hardware,and make sure your network is as secure as you think it is.

Don’t look now, but your mailbox is full of junk, and a snooper is live on a distant server, reading your opinions of your boss. Remember when email used to be easy? To restore some sanity to your correspondence, you’ll need the right tools.

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.

Security experts are always concerned with WLAN access points, but they sometimes forget that the client is also open to attack. Public hotspots make it quite easy for attackers to hijack connections, as the Hotspotter tool demonstrates.

Any user on a LAN can sniff and manipulate local traffic. ARP spoofing and poisoning techniques give an attacker an easy way in.

Encrypting a home directory is easy. Encrypting your whole hard disk – including the root filesystem – takes a little more effort.

If you’re not a security expert and you're looking for a crypto filesystem, you may be wondering about the alternatives. We took at a look at some popular crypto options for Linux.

Today’s computers are fast enough for some very sophisticated cryptography techniques. We’ll show you how to keep your data safe from the prying eyes of snoops and spies.