Articles
To read the articles in this section, simply click on the article title or read button on the far right (if visible).
Use the below filters to customise the number of articles displayed or search for specific title topics/keywords.
| Articles | |
|---|---|
|
Articles:
VLAN Security - Making the Most of VLANs
| Read |
|
Articles:
VTP Pruning
| Read |
|
Articles:
VTP Protocol - In-Depth Analysis
| Read |
|
Articles:
VTP Introduction & Modes
| Read |
| Read | |
| Read | |
| Read | |
| Read | |
|
Articles:
VLANs - Access & Trunk Links
| Read |
|
Articles:
Dynamic VLANs
| Read |
|
Articles:
Static VLANs
| Read |
| Read | |
|
Articles:
The VLAN Concept - Introduction to VLANs
| Read |
Suggested Articles:
TCP - UDP Protocol Analysis
Transmission Control Protocol - Part 2: Quick Ove…
As previously mentioned on a number of occasions, TCP is one of the two protocols that lives at the Transport layer and is used to carry data from on…
ICMP Protocol
ICMP Protocol - Part 4: Destination Unreachable M…
The 'ICMP Destination unreachable' message is quite interesting, because it doesn't actually contain one message, but infact six! This means that the…
Network Protocols
Understanding VPN IPSec Tunnel Mode and IPSec Tra…
IPSec’s protocol objective is to provide security services for IP packets such as encrypting sensitive data, authentication, protection against repla…
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. T…
Featured Subcategories:
Netflow Articles:
NetFlow Analyzer: Free Download, Step-by-Step Ins…
In our previous article we explained how a Netflow Analyzer can help you gain visibility into your user traffic, application traffic and data flows w…
Complete Guide to Netflow: How Netflow & its Comp…
This article will cover the basics of Netflow, including its use cases, Netflow supported devices, Netflow history, and variants. We’ll also dive int…
Netflow vs SNMP. Two Different Approaches to Netw…
SNMP (Simple Network Management Protocol) and Netflow are both popular protocols with admins, prized for their ability to give visibility over the ne…
Netflow: Monitor Bandwidth & Network Utilization…
Monitoring network traffic & bandwidth usage via Netflow is mandatory for any type and size network. Gaining visibility into user traffic, applic…
Wi-Fi Key Generator
Follow Firewall.cx
Cisco Password Crack
Decrypt Cisco Type-7 Passwords on the fly!
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…
VLAN Networks
VLANs - IEEE 802.1q Trunk Link Protocol Analysis
While the VLAN Tagging article briefly covered the IEEE 802.1q protocol this article will continue building upon it by further analyzing the IEEE 802.1q T…
VLAN Networks
InterVLAN Routing - Routing between VLAN Networks
This article deals with the popular topic of InterVLAN routing, which is used to allow routing & communication between VLAN networks. Our article anal…
VLAN Networks
VLAN Tagging - Understanding VLANs Ethernet Frames
We mentioned that Trunk Links are designed to pass frames (packets) from all VLANs, allowing us to connect multiple switches together and independently co…
Routing
Distance Vector Routing Protocols
Distance Vector routing protocols use frequent broadcasts (255.255.255.255 or FF:FF:FF:FF) of their entire routing table every 30 sec. on all their interf…
Routing
OSPF - Part 1: Introduction, OSPF Packet Structure, OS…
Open Shortest Path First (OSPF) is a popular routing protocol developed for Internet Protocol (IP) networks by the Interior Gateway Protocol (IGP) working…
Routing
Routing Information Protocol - RIP
Routing Information Protocol (RIP) is a distance-vector routing protocol that is commonly used in small to medium-sized networks. It is one of the o…
Routing
Link State Routing Protocols
Link State routing protocols do not view networks in terms of adjacent routers and hop counts, but they build a comprehensive view of the overall network…
Windows Servers
Installation and Configuration of Fine-Grained Passwor…
Microsoft introduced Fine-Grained Password Policy for the first time in Windows Server 2008 and the policy has been part of every Windows Server since the…
Cisco Firewalls
Converting Cisco Firepower from Platform mode to Appli…
This article explains how to configure a Cisco Firepower 2100 series device to operate in Appliance mode. We’ll show you how to switch from Platform mode…
Virtualization & VM Backup
World Backup Day with Free Amazon Voucher and Prizes f…
Celebrate World Backup Day and WIN with Altaro!
We all remember how grateful we were to have backup software when facing so many data loss mishaps and n…
SASE & SD-WAN Networks
SASE and VPNs: Reconsidering your Mobile Remote Access…
The Virtual Private Network (VPN) has become the go to security solution for keeping communications between networks and endpoints secure. After all, VPNs…







