2025-10-31
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. ...
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2025-09-26
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. ...
2025-05-21
Real-time BGP route visualization is now available on Cloudflare Radar, providing immediate insights into global Internet routing....
2024-09-02
On September 3, 2024, the White House published a report on Internet routing security. We’ll talk about what that means and how you can help....
2024-08-06
Read through the latest milestones and expansions of Cloudflare's global backbone and how it supports our Connectivity Cloud and our services...
June 21, 2024 1:00 PM
Similar to actions taken over the last several years, governments in Syria, Iraq, and Algeria have again disrupted Internet connectivity nationwide in an attempt to prevent cheating on exams. We investigate how these disruptions were implemented, and their impact...
September 26, 2023 1:00 PM
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...
July 28, 2023 1:00 PM
BGP origin hijacks allow attackers to intercept, monitor, redirect, or drop traffic destined for the victim's networks. We explain how Cloudflare built its BGP hijack detection system, from its design and implementation to its integration on Cloudflare Radar...
December 16, 2022 2:00 PM
Is BGP safe yet? If the question needs asking, then it isn't. But how far the Internet is from this goal is what we set out to answer....
November 24, 2022 5:31 PM
Routing on the Internet follows a few basic principles. Unfortunately not everything on the Internet is created equal, and prepending can do more harm than good. In this blog post we’ll talk about the problems that prepending aims to solve, and some alternative solutions...
November 23, 2022 4:00 PM
In this blog post, we will introduce our new system designed to detect route leaks and its integration on Cloudflare Radar and its public API....
February 23, 2022 1:59 PM
On February 1, 2022, a configuration error on one of our routers caused a route leak of up to 2,000 Internet prefixes to one of our Internet transit providers. This leak lasted for 32 seconds and at a later time 7 seconds...
October 08, 2021 3:16 PM
Today, we're going to show you how the Facebook and affiliate sites downtime affected us, and what we can see in our data....
October 04, 2021 9:08 PM
Today at 1651 UTC, we opened an internal incident entitled "Facebook DNS lookup returning SERVFAIL" because we were worried that something was wrong with our DNS resolver 1.1.1.1. But as we were about to post on our public status page we realized something else more serious was ...
March 25, 2021 1:00 PM
Today, we're excited to announce Route Leak Detection, a new network alerting feature that tells customers when a prefix they own that is onboarded to Cloudflare is being leaked....
November 06, 2020 12:36 PM
The cap of two hundred thousand routing cryptographic records was recently passed. We thought it was time for an update on a major year for RPKI....
June 26, 2020 11:00 AM
Cloudflare launches Regional Services, giving customers control over where their data is processed....
April 17, 2020 3:00 PM
BGP leaks and leaks and hijacks have been accepted as an unavoidable part of the Internet for far too long. Today, we are releasing isBGPSafeYet.com, a website to track deployments and filtering of invalid routes by the major networks....
March 03, 2020 2:00 PM
Today’s Internet requires stronger protection within its core routing system and as we have already said: it's high time to stop BGP route leaks and hijacks by deploying operationally-excellent RPKI!...
June 26, 2019 10:22 PM
On Monday we wrote about a painful Internet wide route leak. We wrote that this should never have happened because Verizon should never have forwarded those routes to the rest of the Internet. Today we will dive into the archived routing data and analyze it....
