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VLAN Networks
Dynamic VLANs were introduced to grant the flexibility and complexity(!) that Static VLANs did not provide. Dynamic VLANs are quite rare because of their requirements and initial administrative overh…
Network Fundamentals
Unicast is a communication method used in computer networking where data is sent from a single sender to a specific destination device. In this method, the sender sends the data packet to a uni…
Linux - Unix
The first question is - what are the benefits of using Linux instead of Windows? This is in fact a constant debate between the Windows and Linux communities and while we won't be taking either side…
OpManager - Network Monitoring & Management
Learn how IT Experts and Managers take on their organization’s challenges while working remotely. How do you continue your IT Operation Management Strategy while at the same time ensuring Network Com…
TCP - UDP Protocol Analysis
Understanding how each protocol fits into the OSI Model is essential for any network engineer. This page analyses how TCP is classified as a 'transport protocol' and gives you an insight into what to…
Cisco Switches
The SG500 series Cisco switches are the next step up from the already popular SG300 Layer-3 switches. Cisco introduced the SG Small Business series switches to compete against DELL’s and HP’s offerin…
Cisco Wireless
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…
Network Fundamentals
In this section we are going to talk about the different ways a firewall can be set up. Depending on your needs, you can have a very simple firewall setup which will provide enough protection for you…
Windows Servers
FREE Hyper-V & VMware Virtualization Backup:  FREE for Firewall.cx readers for a Limited Time!  Download Now! Windows Server 2012 Editions On the 1st of August, 2012 Microsoft releas…
Network Address Translation - NAT
The previous page (Static NAT - Part 1) helped us understand what exactly happens with Static NAT and how it works, and we saw a few examples of how to use it in various network configurations. This…
Cisco Routers
Our DMVPN Introduction article covered the DMVPN concept and deployment designs. We explained how DMVPN combines a number of technologies that give it its flexibility, low administrative overhead and…
Routing
This article covers basic OSPF concepts and operation. We explain how OSPF works, how OSPF tables are built on an OSPF-enabled router and their purpose (Neighbour Table, Topology Table, Routing Table…

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