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Facebook’s historic outage, explained

Kentik

Yesterday the world’s largest social media platform suffered a global outage of all of its services for nearly six hours. Included in the withdrawn prefixes were the IP addresses of Facebook’s authoritative DNS servers, rendering them unreachable. tfbnw.net — which is another router inside AS32934 that belongs to Facebook.

TCP 145
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How to find applications with NetFlow

Kentik

Back in the 1990s, NetFlow was introduced on Cisco routers as a means to collect information about IP network traffic as it enters or exits an interface. Perhaps you want to know if the traffic you are investigating is related to video streaming, voice or social media. NetFlow application monitoring: Use DNS logs.

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Resilience and Redundancy in Networking

Kentik

IP address abstraction and failover capabilities with DNS Domain Name System (DNS) is a system for mapping domain names to IP addresses. By using DNS, users can access a website or other service using a human-readable name without needing to remember the IP address.

Network 52
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News in Networking: Advanced Analytics for an Oil Company & HCI for an NFL Team

Kentik

project to build cloud computing solutions (Pittsburgh Post-Gazette) Carnegie Mellon University (CMU) has a big investment in a new program “to build a smarter solution for edge devices — like a router or larger access point to a network — to operate on the cloud,” according to the Pittsburgh Post-Gazette. Carnegie Mellon is home to a $27.5M

Network 40
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The State of DDoS Attacks and Defense

Kentik

The Akamai report identifies these top infrastructure attack vectors as UDP fragmentation, Domain Name Service (DNS) reflection, and Network Time Protocol (NTP) reflection. Incomplete baselining: - Per router/flow exporter (not network-wide); - Single dimension monitoring & alerting.

IoT 40
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A Brief History of the Internet’s Biggest BGP Incidents

Kentik

In this incident, a software bug caused a router to announce a large part of the IP address ranges present in the global routing table as if they were originated by AS7007. Two competing methodologies, RPSL and RPKI, are used to inform the defensive configuration of routers.

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Egnyte Architecture: Lessons learned in building and scaling a multi petabyte content platform

High Scalability

We started with SEM/SEO but over time as we grew, we used many channels to acquire customers like Social media, Biz dev, Trade shows, SEM, SEO, Inbound marketing and high touch sales for Enterprise customers. Which DNS service do you use? Which routers do you use? DC_central is a DNS database and remains fairly static.