[Tunnel] Add dns-resolver-addrs run parameter#29120
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nikitacano wants to merge 2 commits intoproductionfrom
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[Tunnel] Add dns-resolver-addrs run parameter#29120nikitacano wants to merge 2 commits intoproductionfrom
nikitacano wants to merge 2 commits intoproductionfrom
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This PR requires additional review attention because it affects the following areas: PartialsThis PR updates partial files, which are pieces of content used across multiple files in our Render component.
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This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:
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Preview URL: https://ad6c9193.preview.developers.cloudflare.com |
ranbel
reviewed
Mar 19, 2026
ranbel
reviewed
Mar 19, 2026
| | ------------------------------------------------------------------------- | --------------------------- | | ||
| | `cloudflared tunnel run --dns-resolver-addrs <IP:PORT> <UUID or NAME>` | `TUNNEL_DNS_RESOLVER_ADDRS` | | ||
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| Specifies custom DNS resolver addresses for `cloudflared` to use. Each address must be in `ip:port` format — providing an IP address without a port will cause `cloudflared` to fail to start. You can specify multiple resolvers by repeating the flag. For example, |
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| Specifies custom DNS resolver addresses for `cloudflared` to use. Each address must be in `ip:port` format — providing an IP address without a port will cause `cloudflared` to fail to start. You can specify multiple resolvers by repeating the flag. For example, | |
| Specifies custom DNS resolver addresses for `cloudflared` to use for [private hostname routing](/cloudflare-one/networks/connectors/cloudflare-tunnel/private-net/cloudflared/connect-private-hostname/#scenario-b-use-a-specific-private-dns-server-advanced). Each address must be in `ip:port` format — providing an IP address without a port will cause `cloudflared` to fail to start. You can specify multiple resolvers by repeating the flag. For example, |
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can we explain what the custom DNS resolvers are used for?
ranbel
reviewed
Mar 19, 2026
| cloudflared tunnel run --dns-resolver-addrs 1.1.1.1:53 --dns-resolver-addrs 1.0.0.1:53 <UUID or NAME> | ||
| ``` | ||
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| A maximum of 10 resolver addresses are allowed. |
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How does cloudflared determine which resolver to use?
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Summary
--dns-resolver-addrsflag forcloudflared tunnel runip:portformat (bare IP causes cloudflared to fail)2025.7.0or later/tunnel/advanced/run-parameters/and/cloudflare-one/.../run-parameters/