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Bryton Herdes

Principal Network Engineer

July 24, 2026
BGP ORIGIN attribute manipulation and its impact on the Internet

By doing in-depth testing, we found nearly 70% of BGP paths experience ORIGIN attribute rewrites by transit providers seeking traffic advantages. We examine the global impact of this practice and argue for deprecating ORIGIN in route selection.

Iliana Xygkou and Bryton Herdes

June 3, 2026
Enforcing the First AS in BGP AS_PATHs

BGP is vulnerable to routing hijacks and path leaks that negatively impact traffic on the Internet. RPKI helps solve some of these problems, but for some forged paths, we need to rely on a simpler mechanism: First AS enforcement in BGP.

Bryton Herdes,Bryce Walters, and Mingwei Zhang

February 27, 2026
ASPA: making Internet routing more secure

ASPA is the cryptographic upgrade for BGP that helps prevent route leaks by verifying the path network traffic takes. New features in Cloudflare Radar make tracking its adoption easy.

Mingwei Zhang and Bryton Herdes

January 23, 2026
Route leak incident on January 22, 2026

An automated routing policy configuration error caused us to leak some Border Gateway Protocol prefixes unintentionally from a router at our Miami data center. We discuss the impact and the changes we are implementing as a result.

Bryton Herdes and Tom Strickx

January 6, 2026
A closer look at a BGP anomaly in Venezuela

There has been speculation about the cause of a BGP anomaly observed in Venezuela on January 2. We take a look at BGP route leaks, and dive into what the data suggests caused the anomaly in question.

Bryton Herdes

October 31, 2025
BGP zombies and excessive path hunting

A BGP “zombie” is essentially a route that has become stuck in the Default-Free Zone (DFZ) of the Internet, potentially due to a missed or lost prefix withdrawal. We’ll walk through some situations where BGP zombies are more likely to rise from the dead and wreak havoc.

Bryton Herdes,June Slater, and Mingwei Zhang

September 26, 2025
Monitoring AS-SETs and why they matter

We will cover some of the reasons why operators need to monitor the AS-SET memberships for their ASN, and now Cloudflare Radar can help.

Mingwei Zhang and Bryton Herdes

August 22, 2025
Cloudflare incident on August 21, 2025

On August 21, 2025, an influx of traffic directed toward clients hosted in AWS us-east-1 caused severe congestion on links between Cloudflare and us-east-1. In this post, we explain the details.

David Tuber,Emily Music, and Bryton Herdes

February 10, 2025
QUIC action: patching a broadcast address amplification vulnerability

Cloudflare was recently contacted by researchers who discovered a broadcast amplification vulnerability through their QUIC Internet measurement research. We've implemented a mitigation.

Josephine Chow,June Slater,Bryton Herdes, and Lucas Pardue

October 30, 2024
Cloudflare’s perspective of the October 30, 2024, OVHcloud outage

On October 30, 2024, cloud hosting provider OVHcloud (AS16276) suffered a brief but significant outage. Within this post, we review Cloudflare’s perspective on this outage.

Bryton Herdes,David Belson, and Tanner Ryan

August 6, 2024
The backbone behind Cloudflare’s Connectivity Cloud

Read through the latest milestones and expansions of Cloudflare's global backbone and how it supports our Connectivity Cloud and our services

Shozo Moritz Takaya and Bryton Herdes

July 4, 2024
Cloudflare 1.1.1.1 incident on June 27, 2024

On June 27, 2024, a small number of users globally may have noticed that 1.1.1.1 was unreachable or degraded. The root cause was a mix of BGP (Border Gateway Protocol) hijacking and a route leak

Bryton Herdes,Mingwei Zhang, and Tanner Ryan

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