In this post, we work on our understading of the operation of RIP and how split horizon rule work Lab setup In our setup, R1 and R2 routers are in RIP domain and exchange information about loopback 0 and 1 networks. R1 is participating also to a static routing domain and advertises loopback 88 and…
Dans ce blog, nous discuterons du SD-WAN pour essayer de comprendre son enjeu et avantage pour l’entreprise. Nous commençons par explorer l’offre du marché, définir la technologie et son principe de base, du besoin de son usage et scénarios, avant de discuter de son architecture, implémentation et troubleshooting de son opération. Marché (offres du) Incontestablement…...
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In this blog, we discuss when a gateway decides that it’s not a good gateway any more and proposes a new gateway to the host by setting redirection. Introduction We explore how a gateway (a router) present in a LAN handles routing to the outside of this network and uses redirection to enhance this operation….
Cisco secure client is a piece of software that install on a user pc, the endpoint. But it is not limited to, it installs also on mobile device. That’s just awesome! Let’s explore in this blog how this client helps secure the DNS. A little theoretical background Before we deep dive into how DNS protection…...
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Introduction Dans cet article nous discutons de la fonction de base d’un WAF ou pare-feu d’applications web. Comme son nom l’indique il s’agit de sécuriser l’application, plus précisemment l’accès à cette application, et ne se préoccupe pas nécessairement d’autres aspects sécuritaires : réseau, d’autres applicatifs (niveau 7 OSI) ou de transport (niveau 4 et 5…
In this blog, we study RPF operation. Introduction This blog is a part of a serie of blogs about multicast routing: Test network In our test network RPF in action At R2 A “show ip interface brief” shows Digging into the interface tunnel0 details The tunnel was created by PIM process to join the RP…
