I came across an odd little issue recently when configuring a first hop redundancy with two Vyatta routers.In high availability mechanism such as VRRP and clustering routers, traffic can be successfully forwarded over a backup system if the primary system fails; however, the Vyatta router lacks a technology for sharing a firewall between two or more Active-Active routers. If you are using two Vyatta routers on your network, one of the routers has to be on standby mode until t

If you are like me, Who went through the pain trying to capture Vyatta's connection-tracking table for trouble shooting purposes, You will find this article very helpfull,Capturing the contrack-table will help you get information about the IP addresses that comes in and out of your Vyatta routers with all the source and destination port numbers. Because, The Vyatta routers don't save the conntrack-table by default on their logs, You will have to capture it manually by editi

DoD and DDoS Attack A denial of service (DoS) attack is a malicious attempt to make a server or a network resource unavailable to users, usually by temporarily interrupting or sending the services of a host connected to the internet. Although a DoS attack does not usually result in the theft of information or security loss, it can cost the targeted person or company a great deal of time and money. Typically, the loss of the service is the inability of a particular network s

One of my favorite packet switching technology is MPLS. Mpls allows most packet to be forwarded at Layer-2 (the switching level) rather than having to be passed up to Layer-3 (the routing level). Each packet gets labeled on entry into the service provider's network by the ingress router. MPLS gives network oprators a great deal of flexibility to divert and route traffic around link failure, congestion, and bottleneck.This article might help you out when configuring MPLS betwe