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David Belson

37 articles by David Belson.

Engineering — Online outages: Q3 2025 Internet disruption summary

Online outages: Q3 2025 Internet disruption summary

In Q3 2025, global Internet disruptions were caused by everything from government shutdowns to stray bullets and earthquakes. This report analyzes the traffic data behind these outages to show their real-world impact on connectivity.

DBDavid BelsonDavid Belson·October 28, 2025Engineering
Engineering — A diversity of downtime: the Q4 2024 Internet disruption summary

A diversity of downtime: the Q4 2024 Internet disruption summary

After a rather busy third quarter, the fourth quarter of 2024 saw significantly fewer Internet disruptions. This quarter, notable outages were caused by cable cuts, power outages, natural disasters, military action, maintenance, and government direction. Read on for the details.

DBDavid BelsonDavid Belson·January 28, 2025Engineering
Engineering — Cloudflare 2024 Year in Review

Cloudflare 2024 Year in Review

The 2024 Cloudflare Radar Year in Review is our fifth annual review of Internet trends and patterns at both a global and country/region level. For 2024, we added several new metrics, as well as the ability to do year-over-year and geographic comparisons for selected metrics.

DBDavid BelsonDavid Belson·December 9, 2024Engineering
Networking — Impact of Verizon's September 30 outage on Internet traffic

Impact of Verizon's September 30 outage on Internet traffic

On Monday, September 30, customers on Verizon’s mobile network in multiple cities across the United States reported experiencing a loss of connectivity. HTTP request traffic data from Verizon’s mobile ASN (AS6167) showed nominal declines across impacted cities.

DBDavid BelsonDavid Belson·October 1, 2024Networking
SRE & Ops — A recent spate of Internet disruptions

A recent spate of Internet disruptions

Cloudflare Radar is constantly monitoring the Internet for widespread disruptions. Here we examine several recent noteworthy disruptions detected in the first month of Q3, including traffic anomalies observed in Bangladesh, Syria, Pakistan, and Venezuela.

DBDavid BelsonDavid Belson·August 1, 2024SRE & Ops
Engineering — Q2 2024 Internet disruption summary

Q2 2024 Internet disruption summary

Government directed shutdowns and cable cuts were both significant sources of Internet outages in Q2 2024. This post explores these disruptions, as well as others caused by power outages, maintenance,

DBDavid BelsonDavid Belson·July 16, 2024Engineering
Security — Launching email security insights on Cloudflare Radar

Launching email security insights on Cloudflare Radar

The new Email Security section on Cloudflare Radar provides insights into the latest trends around threats found in malicious email, sources of spam and malicious email, and the adoption of technologies designed to prevent abuse of email

DBDavid BelsonDavid Belson·March 8, 2024Security
Engineering — Q4 2023 Internet disruption summary

Q4 2023 Internet disruption summary

In this post, we review selected Internet disruptions observed by Cloudflare during the fourth quarter of 2023, supported by traffic graphs from Cloudflare Radar and other internal Cloudflare tools, and grouped by associated cause or common geography

DBDavid BelsonDavid Belson·January 22, 2024Engineering
Engineering — Cloudflare 2023 Year in Review

Cloudflare 2023 Year in Review

The 2023 Cloudflare Radar Year in Review is our fourth annual review of Internet trends and patterns observed throughout the year at both a global and country/region level...

DBDavid BelsonDavid Belson·December 12, 2023Engineering
Engineering — Q3 2023 Internet disruption summary

Q3 2023 Internet disruption summary

In this post, we review selected Internet disruptions observed by Cloudflare during the third quarter of 2023, supported by traffic graphs from Cloudflare Radar and other internal Cloudflare tools, and grouped by associated cause or common geography

DBDavid BelsonDavid Belson·October 25, 2023Engineering
SRE & Ops — Traffic anomalies and notifications with Cloudflare Radar

Traffic anomalies and notifications with Cloudflare Radar

Cloudflare Radar now displays country and ASN traffic anomalies in the Outage Center as they are detected, as well as publishing anomaly information via API. We are also launching Radar notifications, enabling users to subscribe to notifications about traffic anomalies

DBDavid BelsonDavid Belson·September 26, 2023SRE & Ops
Engineering — Q2 2023 Internet disruption summary

Q2 2023 Internet disruption summary

In this post, we review selected Internet disruptions observed by Cloudflare during the second quarter of 2023, supported by traffic graphs from Cloudflare Radar and other internal Cloudflare tools, and grouped by associated cause or common geography

DBDavid BelsonDavid Belson·July 27, 2023Engineering
Networking — Cloudflare’s view of Internet disruptions in Pakistan

Cloudflare’s view of Internet disruptions in Pakistan

Following the arrest of ex-PM Imran Khan, violent protests led the Pakistani government to order the shutdown of mobile Internet services and blocking of social media platforms. We examine the impact of these shutdowns on Internet traffic in Pakistan and traffic to Cloudflare’s 1.1.1.1 DNS resolver.

DBDavid BelsonDavid Belson·May 12, 2023Networking
Engineering — Internet disruptions overview for Q1 2023

Internet disruptions overview for Q1 2023

In this post, we review selected Internet disruptions observed by Cloudflare during the first quarter of 2023, supported by traffic graphs from Cloudflare Radar and other internal Cloudflare tools, and grouped by associated cause or common geography

DBDavid BelsonDavid Belson·April 12, 2023Engineering
Engineering — Internet disruptions overview for Q4 2022

Internet disruptions overview for Q4 2022

In this post, we review selected Internet disruptions observed by Cloudflare during the fourth quarter of 2022, supported by traffic graphs from Cloudflare Radar and other internal Cloudflare tools, and grouped by associated cause or common geography.

DBDavid BelsonDavid Belson·January 20, 2023Engineering
Engineering — Internet disruptions overview for Q3 2022

Internet disruptions overview for Q3 2022

In this post, we review selected Internet disruptions observed by Cloudflare during the second quarter of 2022, supported by traffic graphs from Cloudflare Radar and other internal Cloudflare tools, and grouped by associated cause or common geography

DBDavid BelsonDavid Belson·October 18, 2022Engineering
Engineering — Internet disruptions overview for Q2 2022

Internet disruptions overview for Q2 2022

In this post, we review selected Internet disruptions observed by Cloudflare during the second quarter of 2022, supported by traffic graphs from Cloudflare Radar and other internal Cloudflare tools.

DBDavid BelsonDavid Belson·July 5, 2022Engineering
Engineering — Internet Explorer, we hardly knew ye

Internet Explorer, we hardly knew ye

With the recent retirement of Microsoft Internet Explorer 11, we analyzed Internet Explorer traffic trends. Breaking the traffic down by bot score revealed much of this traffic is “likely automated”

DBDavid BelsonDavid Belson·June 29, 2022Engineering
Engineering — Internet disruptions overview for Q1 2022

Internet disruptions overview for Q1 2022

In this post, we review selected Internet disruptions observed by Cloudflare during the first quarter of 2022, supported by traffic graphs from Cloudflare Radar and other internal Cloudflare tools, and grouped by associated cause

DBDavid BelsonDavid Belson·April 4, 2022Engineering