This is the second post in the two part series on BGP path validation over on the LinkedIn Engineering blog. We left off last time after having described the eight operational requirements that must be met for any system that reduces our reliance on transitive trust in relation to the AS Path. As a reminder,…

BGP provides reachability for the global ‘net, as well as being used in many private networks. As a system, BGP (ultimately) isn’t very secure. But how do we go about securing BGP? This series investigates the questions, constraints, and solutions any proposal to secure BGP must deal with as a case study of asking the…

Let’s have a little talk about BGP convergence. We tend to make a number of assumptions about the Internet, and sometimes these assumptions don’t always stand up to critical analysis. . . . On the Internet anyone can communicate with anyone else – right? -via APNIC Geoff Huston’s recent article on the reality of Internet…

In part 1 of this series, I looked at the general problem of securing BGP, and ended by asking three questions. In part 2 and part 3, I considered the third question: what can we actually prove in a packet switched network. For this section, I want to return to the first question: Should we…

This is my talk on BGP security from the latest NANOG. Some of the questions I discuss in this talk, and some of the solutions, interact with the series I currently have running on BGP security here.

To recap (or rather, as they used to say in old television shows, “last time on ‘net Work…”), this series is looking at BGP security as an exercise (or case study) in understanding how to approach engineering problems. We started this series by asking three questions, the third of which was: What is it we…

In part 1 of this series, I pointed out that there are three interesting questions we can ask about BGP security. The third question I outlined there was this: What is it we can actually prove in a packet switched network? This is the first question I want dive in too—this is a deep dive,…

What would it take to secure BGP? Let’s begin where any engineering problem should begin: what problem are we trying to solve? In this network—in any collection of BGP autonomous systems—there are three sorts of problems that can occur at the AS level. For the purposes of this explanation, assume AS65000 is advertising 2001:db8:0:1::/64. While…

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