Analyzing Routing Tables

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By Timur Snoke
Member of the Technical Staff
CERT Network Situational Awareness Team

Timur SnokeOccasionally this blog will highlight different posts from the SEI blogosphere. Today we are highlighting a post from the CERT/CC Blog by Timur Snoke, a member of the technical staff in the SEI’s CERT Division. This post describes maps that Timur has developed using Border Gateway Protocol (BGP) routing tables to show the evolution of public-facing autonomous system numbers (ASN).  These maps help analysts inspect the BPG routing tables to reveal disruptions to an organization’s infrastructure.  They also help analysts glean geopolitical information for an organization, country, or a city-state, which helps them identify how and when network traffic is subverted to travel nefarious alternative paths to place communications deliberately at risk.


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