Skip to main content

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.

Suggested Articles:

TCP - UDP Protocol Analysis

TCP Header Anaylsis - Section 2: TCP Sequence &...

This page will closely examine the Sequence and Acknowledgement numbers. The very purpose of their existence is related directly to the fact that t...
Network Fundamentals

Firewall Topologies

In this section we are going to talk about the different ways a firewall can be set up. Depending on your needs, you can have a very simple firewal...
Supernetting & CIDR

What is Supernetting (Route Summarization) & Ho...

Supernetting is the opposite of of subnetting, and is also known as route aggregation or CIDR (Classless Inter-Domain Routing). Supernetting is a t...
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 estab...

Featured Subcategories:

Netflow Articles:

Netflow: Monitor Bandwidth & Network Utilizatio...

Monitoring network traffic & bandwidth usage via Netflow is mandatory for any type and size network. Gaining visibility into user traffic, appl...

Netflow vs SNMP. Two Different Approaches to Ne...

SNMP (Simple Network Management Protocol) and Netflow are both popular protocols with admins, prized for their ability to give visibility over the ...

Complete Guide to Netflow: How Netflow & its Co...

This article will cover the basics of Netflow, including its use cases, Netflow supported devices, Netflow history, and variants. We’ll also dive i...

NetFlow Analyzer: Free Download, Step-by-Step I...

In our previous article we explained how a Netflow Analyzer can help you gain visibility into your user traffic, application traffic and data flows...

Your IP address:

3.144.187.103

All-in-one protection for Microsoft 365

All-in-one protection for Microsoft 365

FREE Hyper-V & VMware Backup

FREE Hyper-V & VMware Backup

Wi-Fi Key Generator

Generate/Crack any
WEP, WPA, WPA2 Key!

Follow Firewall.cx

Network and Server Monitoring

Network and Server Monitoring

Cisco Password Crack

Decrypt Cisco Type-7 Passwords on the fly!

Decrypt Now!

Bandwidth Monitor

Bandwidth Monitor

Free PatchManager

Free PatchManager

EventLog Analyzer

ManageEngine Eventlog Analyzer

Firewall Analyzer

zoho firewall analyzer

Security Podcast

Hornet-Security-The-Swarm-Podcast


VLAN Networks

Static VLANs

VLANs are usually created by the network administrator, assigning each port of every switch to a VLAN. Depending on the network infrastructure and secur...
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 ...
VLAN Networks

Comparing Traditional Flat & VLAN Networks

Designing and building a network is not a simple job. VLANs are no exception to this rule, in fact they require a more sophisticated approach because of...
VLAN Networks

VLAN InterSwitch Link (ISL) Protocol Analysis

Deciding whether to use ISL or IEEE 802.1q to power your trunk links can be quite confusing if you cannot identify the advantages and disadvantages of e...

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 networ...
Routing

OSPF - Part 1: Introduction, OSPF Packet Structure, ...

Open Shortest Path First (OSPF) is a popular routing protocol developed for Internet Protocol (IP) networks by the Interior Gateway Protocol (IGP) worki...
Routing

OSPF - Part 3: OSPF Adjacency & Neighbor Forming Pro...

This is the thrid article of our 6-part OSPF series (see below) that describes how OSPF routers perform neighbor relationship and adjacency. We’ll exami...
Routing

The IP Routing Process - Step-by-Step Analysis

We are going to analyse what happens when routing occurs on a network (IP routing process). When I was new to the networking area, I thought that all yo...

Cisco Routers

How To Configure Dynamic DNS Server On A Cisco Router

Hosting your own webserver or email server would normaly require a static IP address from your ISP. This ensures that your services are always reachable...
Cisco Wireless

Easily Convert Cisco Autonomous - Standalone AP to L...

This article explains how to convert a local or remote Autonomous / Standalone Cisco Aironet Access Point to Lightweight and register it to a Cisco WLC ...
Cisco Switches

Resolving Cisco Switch & Router ‘DHCP Server Pool Ex...

In previous articles, we showed how it is possible to configure a Cisco router or Catalyst switch to provide DHCP server services to network clients. Ev...
Cisco Routers

Cisco Router 'User Exec' Mode

Introduction Let's see what it looks like to be in User-Exec mode on a Cisco router. Below, we have telneted into our lab router and are in User Exec M...