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Fallback DNS now uses UDP first, then TCP

v2026.6.880

1 fixThis release1 fixBug fixesAI-tallied from the release notes

A new GA release for the Windows Cloudflare One Client is now available on the stable releases downloads page.

This hotfix resolves a regression that caused a large increase in DNS-over-TCP queries to fallback and internal DNS servers. The client now sends fallback DNS queries over UDP first, falling back to TCP only when a response is truncated, instead of querying both protocols in parallel.

Fetched July 21, 2026

Fallback DNS now uses UDP first, then TCP (v2026.6.880) —… — releases.sh