Articles That Might Interest:

VLAN Networks

VLAN Security - Making the Most of VLANs

It's easy to see why virtual LANs have become extremely popular on networks of all sizes. In practical terms, multiple VLANs are pretty much the same as having multiple separate physical networks wit…

Virtualization & VM Backup

The Backup Bible. A Free Complete Guide to Disast…

The Free Backup Bible Complete Edition written by backup expert and Microsoft MVP Eric Siron, is comprised of 200+ pages of actionable content divided into 3 core parts, including 11 customizable tem…

Linux - Unix

Understanding, Administering Linux Groups and Use…

In a multi-user environment like Linux, every file is owned by a user and a group. There can be others as well who may be allowed to work with the file. What this means is, as a user, you have all th…

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…

TCP - UDP Protocol Analysis

TCP Header Anaylsis - Section 4: TCP Flag Options

As we have seen in the previous pages, some TCP segments carry data while others are simple acknowledgements for previously received data. The popular 3-way handshake utilises the SYNs and ACKs avail…

Cisco Routers

Configuring Site to Site IPSec VPN Tunnel Between…

Site-to-Site IPSec VPN Tunnels are used to allow the secure transmission of data, voice and video between two sites (e.g offices or branches). The VPN tunnel is created over the Internet public netwo…

Network Protocol Analyzers

Detect Brute-Force Attacks with nChronos Network…

Brute-force attacks are commonly known attack methods by which hackers try to get access to restricted accounts and data using an exhaustive list/database of usernames and passwords. Brute-force atta…

VLAN Networks

VTP Introduction & Modes

The invention of VLANs was very much welcomed by all engineers and administrators, allowing them to extend, redesign and segment their existing network with minimal costs, while at the same time maki…

Cisco Switches

DHCP Option 82 Message Format, Analysis. DHCP Sno…

This article provides in-depth analysis of DHCP Option 82 (DHCP Relay Agent) which is one of the +180 DHCP Options available to the DHCP protocol and used by the Bootstrap Protocol (BOOTP) used for a…

Windows Servers

Windows Server 2016 – Hyper-V Virtualization Upda…

The new Hyper-V virtualization features offered by Windows Server 2016 are planning to make major changes in the virtualization market. From Nested Hyper-V, revolutionary security, new management opt…

Routing

Introduction to Routing Protocols

Distance Vector, Link State RIP, IGRP, EIGRP, OSPF Routing protocols were created for routers. These protocols have been designed to allow the exchange of routing tables, or known networks, betwee…

Palo Alto Networks

How to Fix Palo Alto Firewall “Error: Image File…

Keeping your Palo Alto Firewall up to date with the latest PAN-OS software updates is an important step to ensure your organization is protected against the PAN-OS latest software vulnerabilities, so…