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Windows Servers

Windows Server 2012 File Server Resources Manager…

The Windows Server 2008 first carried FSRM or Fie Server Resources Manager, which allowed administrators to define the file types that users could save to file servers. Windows FSRM has been a part o…

Web Application Vulnerability Scanners

Precision Web Application Vulnerability Scanning…

There are two primary approaches to web application security testing. Dynamic Application Security Testing (DAST), also called black box testing, imitates an attacker. The application is tested from…

Cisco CallManager-CCME

Risk Management for Cisco Unified Communication S…

As technology has advanced, things have become simpler yet more complex. One prime example is that of today’s communication networks. With the evolution of VoIP, the most obvious convergence is that…

Ethernet Protocol, CSMA/CD, Collisions

Manchester Signal Encoding

The device driver software receives a frame of IP, IPX, NetBIOS, or other higher-layer protocol data. From this data, the device driver constructs a frame, with appropriate Ethernet header informatio…

ManageEngine

Free IT Operations Management (ITOM) & Artificial…

With digital transformation revolutionizing the IT industry, Artificial Intelligence for IT Operations (AIOps) has become one of the hottest topics in the IT operations management (ITOM) space. At t…

Subnetting

IP Subnetting - Part 2: Subnet Masks & Their Effe…

There are a few different ways to approach subnetting and it can get confusing because of the complexity of some subnets and the flexibility they offer. For this reason I created this little paragrap…

The OSI Model

The OSI Model: Layer 4 - Transport Layer

The Transport layer is responsible for providing mechanisms for multiplexing upper-layer application, session establishment, data transfer and tear down of virtual circuits. It also hides details of…

Linux - Unix

Installing & Configuring Linux Webmin - Linux Web…

For many engineers and administrators, maintaining a Linux system can be a daunting task, especially if there’s limited time or experience. Working in shell mode, editing files, restartin…

Linux - Unix

Critical 15 Year-old Linux Security Hole (Ghost)…

Security researchers at qualys.com yesterday released information on a critical 15 year-old Linux security hole which affects millions of Linux systems dated back to the year 2000. The newly pu…

ICMP Protocol

ICMP Protocol - Part 7: Time Exceeded Message Ana…

The ICMP - Time Exceeded message is one which is usually created by gateways or routers. In order to fully understand this ICMP message, you must be familiar with the IP header within a packet. Our r…

Virtualization & VM Backup

How to Enable or Disable SSH on VMware ESXi via W…

SSH access to VMware’s ESXi server is by disabled by default however there are many reasons where SSH might be required. VMware and System administrators often find the need to perform advanced admin…

VLAN Networks

VLANs - Access & Trunk Links

If you've read our previous article The VLAN Concept - Introduction to VLANs then you should feel comfortable with terms such as 'VLAN', 'Static & Dynamic VLANs', however this is just…