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Windows Servers

Introduction to Windows DNS – The Importance of D…

The Domain Name System (DNS) is perhaps one of the most important services for Active Directory. DNS provides name resolution services for Active Directory, resolving hostnames, URLs and Fully Qualif…

Cisco Switches

VLAN Security Tips - Best Practices

This article focuses on VLAN Security and its implementation within the business network environment. We provide tips and Cisco CLI commands that will help you upgrade your VLAN network security. Ev…

Cisco Routers

Disabling Cisco Router Password Recovery Service

Most Cisco engineers are aware of the classic Password-Recovery service Cisco equipment have. If the device's credentials are lost, then performing the Password-Recovery procedure will effectively pr…

Cisco Routers

How To Configure DNS Server On A Cisco Router

The DNS protocol is used to resolve FQDN (Fully Qualified Domain Names) to IP addresses around the world. This allows us to successfully find and connect to Internet websites and services no matter w…

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…

Web Application Vulnerability Scanners

How to Test for SQL Injection Attacks & Vulnerabi…

SQL injection vulnerabilities have held the first spot on the OWASP Top 10 list for quite some time. This is due to the fact that they are both still widespread and can lead to very serious consequen…

VPN Services & Guides

What is a VPN? VPNs for Beginners - Everything Y…

What is a VPN? VPN (Virtual Private Network) is a well-known acronym amongst regular internet users. Initially used within businesses to securely connect to the corporate network, nowadays it’s bein…

Cisco Services & Technologies

How to Fix Cisco VPN Client Error 51 – Unable to…

Apple Mac OS X users are frequently faced with the Cisco VPN Client Error 51 - Unable to Communicate with the VPN Subsystem as shown in the screenshot below: When this error is produced, users wil…

Cisco Routers

Cisco Type 7 Password Decrypt / Decoder / Crack T…

The Firewall.cx Cisco Password Decoder Tool (see below) provides readers with the ability to decrypt 'Type 7' cisco passwords. For security reasons, we do not keep any history of decoded passwords…

Cisco Firewalls

Upgrading - Uploading AnyConnect Secure Mobility…

This article will show how to download and upload the newer AnyConnect 4.x VPN clients to your Cisco ASA Firewall appliance (5500 & 5500-X Series) and configure WebVPN so that the newer AnyConnec…

Windows Servers

Windows 2003 DHCP Server Advanced Configuration -…

In this article, we will cover more advanced DHCP features and topics such as server options, superscopes, multicast scopes, dynamic DNS, DHCP database backup and restoration, DHCP migration, and DHC…

Network Fundamentals

Network Unicast - Its role and Importance

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…