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[Tunnel] Add dns-resolver-addrs run parameter - #29120

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ranbel merged 3 commits into
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ncano/tunnel-dns-resolver-addrs
Mar 27, 2026
Merged

ranbel merged 3 commits into
productionfrom
ncano/tunnel-dns-resolver-addrs

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@nikitacano

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Summary

  • Documents the --dns-resolver-addrs flag for cloudflared tunnel run
  • Addresses must be in ip:port format (bare IP causes cloudflared to fail)
  • Maximum of 10 resolver addresses allowed
  • Requires cloudflared 2025.7.0 or later
  • Added to the shared partial so it appears on both /tunnel/advanced/run-parameters/ and /cloudflare-one/.../run-parameters/

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nikitacano requested a review from a team March 19, 2026 10:14
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This PR requires additional review attention because it affects the following areas:

Partials

This PR updates partial files, which are pieces of content used across multiple files in our Render component.

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github-actions Bot commented Mar 19, 2026 •

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This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:

Pattern Owners
/src/content/partials/cloudflare-one/tunnel/ @nikitacano, @ranbel, @cloudflare/pcx-technical-writing

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github-actions Bot commented Mar 19, 2026 •

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Comment thread src/content/partials/cloudflare-one/tunnel/run-parameters.mdx Outdated
Comment thread src/content/partials/cloudflare-one/tunnel/run-parameters.mdx Outdated
Comment thread src/content/partials/cloudflare-one/tunnel/run-parameters.mdx Outdated
@ranbel ranbel self-assigned this Mar 27, 2026

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3 suggestions to address the open review feedback.

  1. Line 170-172: Add blank line after :::note for consistency with other notes in the file.
  2. Line 178: Clarify what the flag does — it makes cloudflared use the specified resolvers instead of the host defaults (does not modify the host).
  3. Line 184: Document random resolver selection behavior per nikitacano's comment.

Comment thread src/content/partials/cloudflare-one/tunnel/run-parameters.mdx Outdated
Co-authored-by: ranbel <101146722+ranbel@users.noreply.github.com>
@ranbel
ranbel enabled auto-merge (squash) March 27, 2026 20:39
@ranbel
ranbel merged commit 8efcd72 into production Mar 27, 2026
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@ranbel
ranbel deleted the ncano/tunnel-dns-resolver-addrs branch March 27, 2026 20:52
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2 participants