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
