"internal network" tag

IPCop 2.0.6: The New Watchdog!

This article describes the various functionalities of a network-based firewall, besides taking readers through the installation and configuration of IPCop 2.0.6, especially from the perspective of a small and medium business. It also…

Secure Your Network with Firewall Builder

A firewall isolates a trusted, secure internal network from another network like the Internet, which is not regarded as either trusted or secure. Firewall Builder is an open source product that makes it…

The cop's patrolling

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 version 2.0 has been out since September 23, 2011….

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…

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…

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