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Guard Your Network with IPCop, Part 3: Block Outgoing Traffic

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The first article in the series discussed IPCop 1.4.21, its basic installation and configuration. Though an excellent firewall distro, basic IPCop has limited functionality....

Cyber Attacks Explained: DNS Invasions

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We often read about defaced websites whose pages get changed to some malicious content. How do hackers do it and how do we protect...

Securing Database Servers

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With the ever-expanding data requirements for Web applications, database administrators often configure security parameters at the OS and database layer. Unfortunately, administrators seldom consider...

Advanced Nmap: Scanning Firewalls Continued

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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...

Capturing Packets in Your C Program, with libpcap

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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...

Advanced Nmap: Scanning Firewalls

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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

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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...

Aircrack-ng: Wi-Fi Troubleshooting, Auditing and Cracking Made Easy

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Wi-Fi technology has today become almost ubiquitous for wireless local area networks at offices, restaurants, homes, airports, hotels, etc. However, with increased Wi-Fi usage...