Serving false signatures to attack scanners with Portspoof
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.
Seasoned attackers, and even some amateur cyber-vandals, find sport in trying to scan servers and hijack them at the same time (Figure 1). Firewalls and Intrusion Detection/Prevention systems can help, but if a single tool could truly stop all potential attacks, the Internet intrusion industry wouldn't even exist.
A professional intrusion attempt is typically preceded by reconnaissance and scanning. Many attackers simply perform a scan, which is easily automated with tools like Nmap. An attacker who discovers a firewall and similar defensive system can often guess which ports and services are worth attacking. However, a tool called Portspoof  intervenes to cause complications and confusion for the attacker. Portspoof answers port requests with a wild mix of signatures and payloads. This confusing and unwanted information slows down any attempted port scan, forcing the attacker to manually evaluate the results in a time-consuming process.
Portspoof was developed in 2012 by Piotr Duszynski, who calls his program a "Service Emulator and Frontend Exploitation Framework." The application is available under the GPLv2 and is implemented in C++.
Buy this article as PDF
Spammers go low-volume, and 90% of IE browsers are unpatched.
Adobe scrambles to release patches for vulnerable Flash Player.
Four-inch-long computer on a stick lets you boot a full Linux system from any HDMI display device.
New statute would require companies to report break-ins to consumers.
Weird data transfer technique avoids all standard security measures.
FIDO alliance declares the beginning of the end for old-style login authentication.
The Linux New Media Awards have honored the most significant products, projects, people, and organizations for open source/Linux every year since 2000.
Legendary Uber-distro splits over the systemd controversy.
New LTS version offers many refinements for the Cinnamon and Mate desktops and significant improvement under the hood.
One of CeBIT’s most successful forums returns in 2015.