Null Probe

China is very particular about Internet Censorship in lot many aspects. One such case is with Baidu Search Engine. If a ‘certain search’ is performed the Great Wall Firewall of China bans/blocks you from visiting Baidu for a small period of time (approx 2 mins). And, it can be reproduced via a simple test which [...]

Capture HPC is a powerful tool to collect malicious behavior by crawling the web, and checking the response from the sever. Here is a nice presentation by David Guan on “Identify Malicious URL using Capture HPC“. Basic, yet conveys the features and process. Enjoy!

What is Cloud Computing? Wikipedia says “Cloud computing is a style of computing in which dynamically scalable and often virtualized resources are provided as a service over the Internet.”
This concept incorporates: 1. IaaS (Infrastructure as a Service) 2. PaaS (Platform as a Service) [...]

HAKIN9 (not Hackin9) is a well known magazine in the fields of Offensive & Defensive Computing. It caters to the needs of Researcher, Security Engineer, Admin, CTO, CIO, CISO, CSO and other decision makers. A magazine, which I have been involved with in recent past, but now just got a little tied up in other [...]

GIF or Graphics Interchange Format is a widely used bitmap image format. The images are usually compressed using the LZW (Lempel-Ziv-Welch) lossless data compression technique. With some NIDS experience, I know how tricky can it be to detect/parse/validate or decode a GIF file on the wire in this World Wide Web where extensions disguise a [...]