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.. _heat-cfn_api:

.. list-table:: Description of Cloudformation-compatible API configuration options
   :header-rows: 1
   :class: config-ref-table

   * - Configuration option = Default value
     - Description
   * - **[DEFAULT]**
     -
   * - ``instance_connection_https_validate_certificates`` = ``1``
     - (String) Instance connection to CFN/CW API validate certs if SSL is used.
   * - ``instance_connection_is_secure`` = ``0``
     - (String) Instance connection to CFN/CW API via https.
   * - **[heat_api_cfn]**
     -
   * - ``backlog`` = ``4096``
     - (Integer) Number of backlog requests to configure the socket with.
   * - ``bind_host`` = ``0.0.0.0``
     - (IP) Address to bind the server. Useful when selecting a particular network interface.
   * - ``bind_port`` = ``8000``
     - (Port number) The port on which the server will listen.
   * - ``cert_file`` = ``None``
     - (String) Location of the SSL certificate file to use for SSL mode.
   * - ``key_file`` = ``None``
     - (String) Location of the SSL key file to use for enabling SSL mode.
   * - ``max_header_line`` = ``16384``
     - (Integer) Maximum line size of message headers to be accepted. max_header_line may need to be increased when using large tokens (typically those generated by the Keystone v3 API with big service catalogs).
   * - ``tcp_keepidle`` = ``600``
     - (Integer) The value for the socket option TCP_KEEPIDLE. This is the time in seconds that the connection must be idle before TCP starts sending keepalive probes.
   * - ``workers`` = ``1``
     - (Integer) Number of workers for Heat service.