"UDP" tag
Middleware basics

Understanding Middleware with Apache ActiveMQ

Even though “middleware” might seem like a close cousin of Tolkien’s Middle Earth, it’s a fairly modern term in computer software and services, and has nothing to do with hobbits, wizards or adventures…

DeliGate, a Proxy

DeleGate — A Multi-platform, Multipurpose Proxy Server

A proxy server works as an intermediary for requests from clients seeking resources from other servers. There are various types of proxy servers. In this article, we will briefly discuss one of them,…

Verify firewall security

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 to various vulnerabilities. Based on the scan results, several…

Introducing libpcap

Capturing Packets in Your C Program, with libpcap

This article provides an introduction to libpcap, and shows, with examples of source code, how you can use it to create your own packet-sniffing programs. All data on the network travels in the…

Firewall Scan

Advanced Nmap: Scanning Firewalls

After four articles on Nmap [1, 2, 3 & 4], which explained a number of command-line options for scan technique specification, target specification, port specifications, host discovery, evasion techniques, etc, it is time…

Scan time!

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 have detailed many important Nmap scan types. Let us…

Nmap Scanning Techniques

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 their practical use. The third article in this series…

Advanced Nmap

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 this article, we discuss in detail various NMap scan…

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