Fastly CDN outage, perhaps not cyber attack (4th Oct, 2021)

Preface: In addition to cyber security attacks. Cloud service providers face different technical challenges, including software and hardware levels.

Background: Fastly is a company that provides content delivery network (CDN) services, mainly providing host static content and quickly showing it to Internet users. Fastly peers with other Internet Service Providers (ISPs) and Content Networks with IPv4 and IPv6 connectivity on Autonomous System (AS) 54113 for the purpose of exchanging traffic between these networks.

Service instability Report on October 4, 2021: It is reported that during the partial paralysis of Fastly CDN, Internet websites and services using the Fastly Content delivery Network (CDN) could not be used normally for more than an hour. Some users cannot access it directly, while others have entered an unexpected version of the website.

Their design attracted my attention: Fastly cloud distributed routing agent, called Silverton, which orchestrates route configuration within Fastly POPs. Silverton peers with the BGP daemon, BIRD, which interfaces with the outside internet. BIRD supports Internet Protocol version 4 and version 6 by running separate daemons. It establishes multiple routing tables,hand uses BGP, RIP, and OSPF routing protocols, as well as statically defined routes. If one service node have problem occurred which let the service up and down frequently (reboot). OSPF will update the routing table until completed. Whereby, it cause network traffic in slow response.

Current Status: Maybe we should wait for the supplier to announce the reason.

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