Blog

April 24th, 2020

A different route leak species

On April 23, 2020, an AS205310 leaked routes from one of its upstreams to another (from AS8220 to AS15943), affecting 90 000 prefixes. In some cases, such an incident could lead to massive network degradation across dozens of ISPs. However, it did not. Why? Because some companies install and maintain their filters properly. And even taking into regard the fact that AS15943 is directly connected to Tier-1 ISPs, they didn’t even notice the incorrect routes. They simply never reached Tier-1s, shrinking in size after each hop. READ MORE →

April 22nd, 2020

AS263444 Hitting the headline again

Today, on April 22, 2020, in the world of BGP routing, a thing that usually occurs in rare circumstances, happened. A year and 11 days ago, on April 11 2019, we wrote our first incident report about a thing that has never been observed before - a hijack by, with the highest probability, BGP optimizing software. Later that year, in summer, Cloudflare was brutally hit by the same type of incident. And today, a year after the first incident with AS263444 belonging to Open X Tecnologia Ltda, the same autonomous system… no, you guessed wrong. READ MORE →