TEK@link

Setup A Checkpoint Lab Using VirtualBox And GNS3 On Windows
In this blog, we will setup a Checkpoint lab using virtualbox and gns3 on windows. Introduction In this lab we implement a basic security architecture to demonstrate the operation of a firewall cluster to protect our network. Our “security domain” is segmented into four zones: Security topology Our security topology is compound by two security...
10 Security Measures Against 10 Attacks In A LAN Network
In this blog, we discuss 10 security measures or controls that a LAN should have enabled. Introduction Before we present the 10 security measures to enable, let’s introduce the operation of a switch in a LAN network. Switches An Ethernet switch is the central element of a LAN network and operates at data link OSI...
DUAL Route FSM Processing Of EIGRP Queries
In this blog, we study how DUAL route FSM Processes EIGRP Queries. Introduction Let’s recall that EIGRP is one of the so called IGP routing protocols. IGP stands for interior routing protocols as opposed to EGP or exterior routing protocols. In addition EIGRP is a hybrid as it borrows some similarities to distance-vector and link-state...
My First Scapied IPV6 Packet
In this blog, let’s build our first IPv6 packet. Introduction The idea of this lab is to craft an IPv6 packet from scratch using Python and Scapy library. The IDE I use is JetBrains PyCharm Community Edition 2018.3.1 x64 which is available for free at : https://www.jetbrains.com/pycharm/download/download-thanks.html?platform=windows&code=PCC The IDE The IDE interface looks like in...
At the Begining, … It Was not DMVPN!
In this blog, let’s discover the DMVPN feature. DMVPN stands for dynamic multipoint virtual private network and as per its naming, refers to the ability for many routers to share the same network built on a Wan equivalent to being connected to the same Lan. Before we start Before we start a little refresh on...

From Router Configuration File to Excel Sheet… A Basic How to Automate Configuration Work Process!

mehdi6 months ago1 month ago08 mins

Dans cet article, nous automatisons le traitement des fichiers de configuration des routeurs Cisco dans un classeur Excel. Introduction Comment récupérer une certaine information d’un fichier de configuration (routeur IOS de Cisco par exemple) et la mettre dans un fichier Excel en vue d’un traitement plus avancé. Ce traitement peut être simplement de comparer cette…...

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Multicast Routing: Rather Than Dense, Sparse It And Let’s Meet At Rendez-Vous Point… Part 5/6

dexterd6 months ago1 month ago05 mins

In this post let’s detail the operation of PIM (Protocol Independent Multicast) in sparse mode. Previous posts tackled the operation of PIM dense mode. Let’s recall that PIM is the multicast routing protocol that allows PIM routers exchange information needed distribute multicast traffic to receivers. Introduction This blog is a part of a serie of…...

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Windows : Drive Healing From Scratch

mehdi6 months ago1 month ago16 mins

In this post, let’s understand hard drive operation and try to find a methodology (procedure) to troubleshoot it (and heal it if needed). Lab setup Let’s describe in detail our “simple” setup. for the purpose of our test we mount this setup: PC + USB to SATA adapter + Seagate 1T HDD. The most basic…

Introduction to Blockchain Networking

dexterd1 month ago1 month ago013 mins

Let’s discover in this blog the world of blockchain the technology that today allows peer to peer “trading” using crypto currency, to make it simple like a starter… Introduction Blockchain is a chain of blocks that are pieces of data, database, registers, books, or list of records (of transactions). Those registers are chained, linked to…...

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RIP Time(r)s, Let’s Understand The Flush Operation

dexterd6 months ago1 month ago16 mins

RIP is Routing Information Protocol, one of the IGP or Interior Gateway Porotocols called also a vector-based routing protocol in contrast with link-state, hybrid or path-based protocols. The function of this protocol is very simple, send updates about known networks through local interfaces enabled for this sending… In this lab we use a standard version…

Build a Mining Strategy From Scratch

mehdi5 months ago1 month ago08 mins

In this blog’s, let’s discuss a “winning” strategy to start mining. Introduction First of all by definition mining is the technique by which you help build the blockchain. let’s imagine that the blockchain in this scheme is like a “big” distributed computer made of all miners computers. the central intelligence of this computer allows the…...

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TEK@link

TEK@link

Is It Sufficient RIP Split-Horizon Rule To Prevent Routing Loops?

Build a Mining Strategy From Scratch

Zabbix it!

Introduction to Blockchain Networking

dRRMize Your WiFi… And Get Your Head out of the Box!

At the Begining, … It Was not DMVPN!

Understand Rip Routing Timers All in One Shot!

Radio Resource Management… in Enterprise Wireless Networks

Vlan Propagation And Cisco FabricPath

Point-to-Point OSPF Network Operation over a LAN that Connects Multiple Routers

From Router Configuration File to Excel Sheet… A Basic How to Automate Configuration Work Process!

Paid one time Membership Required

Multicast Routing: Rather Than Dense, Sparse It And Let’s Meet At Rendez-Vous Point… Part 5/6

Free level Membership Required

Windows : Drive Healing From Scratch

Introduction to Blockchain Networking

Paid one time Membership Required

RIP Time(r)s, Let’s Understand The Flush Operation

Build a Mining Strategy From Scratch

Paid one time Membership Required