Articles That Might Interest:

Domain Name System (DNS)

The DNS Protocol - Part 3: DNS Query Message Form…

This section will deal with the analysis of the DNS packets by examining how DNS messages are formatted and the options and variables they contain. To fully understand a protocol, you must understand…

Windows Servers

Installing Active Directory Services & Domain Con…

This article serves as an Active Directory tutorial covering installation and setup of Windows 2012 Active Directory Services Role & Domain Controller using Windows 2012 PowerShell. Our previous…

Windows Workstations (XP, 7, 8, 10, 11)

How to Enable & Use Windows 8 Startup Settings Bo…

The Windows 8 Start Settings Boot Menu allows users to change the way Windows 8 starts up. This provides users with the ability to enable Safe Mode with or without Command Prompt, Enable Boot Logging…

Web Application Vulnerability Scanners

Everything You Need to Know About SQL Injection A…

SQL Injection Attacks are one of the most popular attacks against web servers, websites and web applications. A fairly popular website can expect to receive anywhere between 80 and 250 SQL injection…

Windows Servers

Windows 2012 Server Foundation, Essential, Standa…

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…

VLAN Networks

VTP Pruning

VTP (VLAN Trunking Protocol) pruning is a feature that is used in Cisco switches to reduce unnecessary traffic in VLAN (Virtual Local Area Network) trunks. When VTP pruning is enabled on a trunk, the…

Routing

Hybrid Routing Protocols - Advantages and Disadva…

Hybrid routing protocols are a combination of distance-vector and link-state routing protocols, and are used to provide a more efficient and scalable routing solution in larger networks. These…

Cisco Wireless

Cisco Wireless Controllers (WLC) Datasheets Avail…

We would like to inform our readers that Firewall.cx has just made available as a free download all of Cisco's Wireless Controller Datasheets. The datasheets provide valuable infomation for all curr…

Cisco Routers

Configuring NAT Overload On A Cisco Router

NAT (Network Address Translation) is a method that allows the translation (modification) of IP addresses while packets/datagrams are traversing the network. NAT Overload, also known as PAT (Port Addr…

Network Protocols

IPv6 Subnetting - How and Why to Subnet IPv6

In the previous tutorials, I went through the need for IPv6, and followed it up by drawing out the salient features which overcomes issues with IPv4. We took the journey of looking inside the headers…

Cisco Routers

Cisco Router PPP Multilink Setup and Configuration

This article provides an in-depth explanation of PPP Multilink and shows how to configure a Cisco router to use PPP Multilink between two serial interfaces (WIC-1T). We'll show you the commands that…

The OSI Model

The OSI Model: Layer 7 - Application Layer

The Application layer of the OSI model is where users communicate with the computer. The Application layer is responsible for identifying and establishing the availability of the intended communicati…