The Internet is a tough place to live – especially for publicly accessible computers. A small tool called Portspoof makes port scanning a real challenge for attackers.

Ultra-sophisticated attack tool might have originated from a state-sponsored intelligence service.

Security breached at home sites of the CMS project.

We look at SharePoint integration and show you how to manage Active Directory from Linux. But first, a special story on a dangerous new class of intrusion tools.

Rootkits allow attackers to take complete control of a computer. We describe the tricks intruders use to gain access to the Linux kernel and provide guidelines on hardening the kernel against such attacks.

The simple but effective Tripwire HIDS provides its service quietly and discreetly, preventing attackers from infecting computers with trojans, backdoors, or modified files by identifying anomalies unnoticed by the user.

If you have enabled IPv6 on your network without considering basic security issues, you might have opened up a hole for attackers. In this article, we demonstrate a successful attack on a server via IPv6 and explain how the popular security tools handle IPv6.

Wireshark doesn’t just work in real time. If you save a history of network activity in a pcap file using a tool such as tcpdump, you can filter the data with Wireshark to search for evidence.