Tag: TCP port
Cyber Attacks Explained: DNS Invasions
We often read about defaced websites whose pages get changed to some malicious content. How do hackers do it and how do we protect...
Guard Your Network with IPCop, Part 1: Installation Basics
The classic version of IPCop 1.4.20, which was released on July 24, 2008, was immediately upgraded to the 1.4.21 ISO installer. The much awaited...
Cyber Attacks Explained: DoS and DDoS
With this article, we begin a new series on the major kinds of cyber attacks that weaken the IT security infrastructure within organisations. With...
Advanced Nmap: Scanning Firewalls Continued
The previous article detailed methods to scan an IPCop-based firewall in a test environment. The scan output revealed several open ports, which could lead...
Advanced Nmap: Scanning Firewalls
After four articles on Nmap , which explained a number of command-line options for scan technique specification, target specification, port specifications, host discovery, evasion...
Advanced Nmap: FIN Scan & OS Detection
Nmap is a fantastic tool, and I just can't refrain from praising it, every time I use it. The earlier articles in this series...
Advanced Nmap: Scanning Techniques Continued
The earlier articles on Nmap had covered the basic features, the working of the TCP 3-way handshake, and some important scan types, along with...
Advanced NMap: Some Scan Types
A broad overview and the basic features of NMap have been covered in an earlier article in this series of articles on Nmap. In...