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docs: give better guidance about how to configure the agent TLS CA

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Daniel Nephin 2021-07-28 18:22:35 -04:00
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website/content/docs/agent/options.mdx
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@ -2211,6 +2211,12 @@ This section documents all of the configuration settings that apply to Agent TLS
TLS is used by the HTTP API, server RPC, and xDS interfaces. Some of these settings may also be TLS is used by the HTTP API, server RPC, and xDS interfaces. Some of these settings may also be
applied automatically by [auto_config](#auto_config) or [auto_encrypt](#auto_encrypt). applied automatically by [auto_config](#auto_config) or [auto_encrypt](#auto_encrypt).
~> **Security Note:** The Certificate Authority (CA) specified by `ca_file` and `ca_path`
should use a private CA, not a public one. We also recommend using a separate CA for
Consul and not sharing the CA with any other systems. Any certificate signed by the
CA will be allowed to communicate with the cluster and a specially crafted certificate
signed by the CA can gain full read and write access to Consul.
- `ca_file` This provides a file path to a PEM-encoded certificate - `ca_file` This provides a file path to a PEM-encoded certificate
authority. The certificate authority is used to check the authenticity of client authority. The certificate authority is used to check the authenticity of client
and server connections with the appropriate [`verify_incoming`](#verify_incoming) and server connections with the appropriate [`verify_incoming`](#verify_incoming)