Core Linux is a small modular system with community build extensions. Based on downloaded extensions the […]
Author: Radovan Brezula
Linux Core as Router and L3 Switch Appliance
The tutorial introduces a virtual router and layer3 switch appliance based on Linux Core. The appliance […]
CCNP SWITCH and GNS3 – part 2.3 LAB - Configuring User AAA authentication and 802.1X port-based authentication
Scenario You start your new carrier as a network professional in company which is responsible […]
CCNP SWITCH and GNS3 – part 2.2 FreeRadius and WPA supplicant installation and configuration
LiSA is Linux Multilayer switch developed by Romanian developers and can do L2 switching and […]
CCNP SWITCH and GNS3 - part 2.1 The theory behind AAA and Dot1x authentication
When I started to learn authentication methods using AAA and port-based authentication using dot1x for […]
CCNP SWITCH 642-813 and GNS3 - part 1 Introduction
Introduction If you want to become a Cisco Certified Network Professional engineer you need to […]
MAC address poisoning attack
The goal of this article is making ARP poisoning attack (Part1) and configure Cisco switch […]
GNS3: How to run multiple Qemu instances in Windows
Hi, I created video in which I showed how to run multiple Qemu instances in […]
MAC address flooding attack in campus network
Theory Hub is a network device which forwards Ethernet received frames to all the ports […]
How to delete “non-existent” VG224 from database of Cisco Unified Communication Manager 7.0
Today we faced very strange behaviour during addition new VG224 to the database Cisco Unified […]