导航|地址|刷新
Update TLS versions

Skip to contentDocumentation Index
Fetch the complete documentation index at: https://developers.cloudflare.com/learning-paths/llms.txt
Use this file to discover all available pages before exploring further.



DocsDirectoryAPISDKsChangelog

Search

Log in






Prevent DDoS attacks (Learning Paths)

/





Concepts


Overview

What is a DDoS attack?

How to prevent DDoS attacks






Baseline DDoS protection


Overview

Proxy DNS records

Enable WAF

Update TLS versions

Set up alerts






Advanced DDoS protection


Overview

Protect origin IP address

Optimize caching

Customize Cloudflare security

Augment default analytics

Restrict external connections






Agent resources


Agent setup ↗

Cloudflare Skills ↗

Code Mode MCP Server ↗

Domain-specific MCP Servers ↗MCP

Learning Paths llms.txt ↗

Learning Paths llms-full.txt ↗

Cloudflare Docs llms.txt ↗

Cloudflare Docs llms-full.txt ↗













Home

/Learning Paths

/…
Prevent Ddos Attacks


/Baseline DDoS protection

/Update TLS versions



Update TLS versions


Last updated Apr 23, 2026|Copy as Markdown|View as Markdown|Agent setup

OverviewAdditional resources




In some circumstances - specifically when an application allows client-initiated SSL/TLS renegotiation - previous versions of SSL/TLS can be more vulnerable to DDoS attacks.

When you use an SSL/TLS certificate issued by Cloudflare1, you can reduce the impact of this vulnerability by:

Updating the Minimum TLS Version accepted by your application.

Allowing TLS 1.3.


Additional resources


For more details on this vulnerability, refer to Secure Server- and Client-Initiated SSL Renegotiation ↗.



Footnotes



Meaning either Universal or Advanced certificates. ↩




PreviousEnable WAFNextSet up alerts


Was this helpful?

YesNo

Edit pageReport issue




On this page

Overview

Additional resources


Edit pageReport issue














Getting started
PlansContact salesPartnersFind a partnerStartupsUnder attack?Domain name search


Company
AboutCareersInvestorsPressPress kitGlobal network




Public interest
Project GalileoAthenian ProjectCloudflare for CampaignsProject FairshotImpact/ESG


Compliance
Compliance resourcesTrust HubData ProtectionResponsible AITransparency reportReport abuse




Resources
App innovation reportCloudflare RadarCase studiesStatusSupportEventsBlog


Developers
DocumentationLearning centerCommunity




Solutions
SSE and SASE platformCloudflare AI CloudAI SecurityFrontend Development PlatformMulti-Tenant Platform DevelopmentWeb Security Platform


Start BuildingLog In












© 2026 Cloudflare, Inc.

Privacy policy|Report security issues|Terms of use|Trademark
|
Your privacy choices








Docs




------
导航页 打开网址