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Network Protocol Analyzers
How to Use Multi-Segment Analysis to Troubleshoot…
Troubleshooting network problems can be a very intensive and challenging process. Intermittent network problems are even more difficult to troubleshoot as the problem occurs at random times with a ra…
Cisco Services & Technologies
Fix Cisco VPN Client Break After Windows 10 Anniv…
Windows 10 latest update 1607 code named Anniversary update promises to introduce a number of significant enhancements including breaking your trustworthy Cisco IPSec VPN client. After installing the…
Linux - Unix
Advanced Linux Commands
Now that you're done learning some of the Basic Linux commands and how to use them to install Linux Software, it's time we showed you some of the other ways to work with Linux. Bear in mind that each…
Network Cabling
Early Communication Technology - Morse Code and E…
We tend to think of digital communication as a new idea but in 1844 a man called Samuel Morse sent a message 37 miles from Washington D.C. to Baltimore, using his new invention ‘The Telegraph’. This…
Cisco Services & Technologies
Cisco VPN Client & Windows 8 (32bit & 64bit) - Re…
The Cisco VPN client is one of the most popular Cisco tools used by administrators, engineers and end-users to connect to their remote networks and access resources. This article shows how to fix the…
Cisco CallManager-CCME
IP Phone 7945, 7965, 7975 Factory Reset Procedure…
This article explains how to reset your Cisco 7945, 7965 and 7975 IP phone to factory defaults, and how to upgrade the firmware to the latest available version. We also provide necessary information…
Network Fundamentals
Network Switches & Bridges
Network Switches are the evolution of Hubs and Repeaters, and enable the creation of networks by connecting multiple devices together. They are critical components in computer networking and are used…
TCP - UDP Protocol Analysis
Transmission Control Protocol - Part 3: The TCP H…
This article shows the TCP Header and Segment. We explain where the TCP Header and Segment are located in an Ethernet frame and also briefly view the available options in the TCP Header. Our easy-to-…
Cisco Routers
How To Configure Windows VPDN (PPTP) Dialup Conne…
Setting up a Windows VPDN connection is a required task in order to connect to a remote network. In previous articles we covered the set up of a VPDN - PPTP server on a Cisco router. Click here to fi…
OpManager - Network Monitoring & Management
Elevate your network management: Maximizing effic…
As technology evolves, so do our networks. Today's sprawling network infrastructures are intricate ecosystems, demanding more from IT teams than ever before. Configuration management, complianc…
Cisco Wireless
Wireless (Wifi) WEP WPA WPA2 Key Generator
The Firewall.cx Wireless LAN Key Generator will allow the generation of a WEP or WPA ASCII based encryption key and will provide the equivalent HEX or ASCII string so it can be inserted directly i…
Web Application Vulnerability Scanners
Creating a Cross-site Scripting (XSS) Attack. Und…
Part two of our Cross-site scripting (XSS) series shows how easy it is to create & execute a XSS attack, helping readers & network security engineers understand how XSS attacks work and how t…
Wi-Fi Key Generator
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Decrypt Cisco Type-7 Passwords on the fly!







