package envoy.extensions.filters.udp.udp_proxy.session.dynamic_forward_proxy.v3

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Configuration for the filter state based dynamic forward proxy filter. See the :ref:`architecture overview <arch_overview_http_dynamic_forward_proxy>` for more information. Note this filter must be used in conjunction to another filter that sets the 'envoy.upstream.dynamic_host' and the 'envoy.upstream.dynamic_port' filter state keys for the required upstream UDP session. [#extension: envoy.filters.udp.session.dynamic_forward_proxy]

• string stat_prefix = 1

  The prefix to use when emitting :ref:`statistics <config_udp_session_filters_dynamic_forward_proxy_stats>`.

• oneof implementation_specifier

  • common.dynamic_forward_proxy.v3.DnsCacheConfig dns_cache_config = 2

    The DNS cache configuration that the filter will attach to. Note this configuration must match that of associated :ref:`dynamic forward proxy cluster configuration <envoy_v3_api_field_extensions.clusters.dynamic_forward_proxy.v3.ClusterConfig.dns_cache_config>`.

• optional FilterConfig.BufferOptions buffer_options = 3

  If configured, the filter will buffer datagrams in case that it is waiting for a DNS response. If this field is not configured, there will be no buffering and downstream datagrams that arrive while the DNS resolution is in progress will be dropped. In case this field is set but the options are not configured, the default values will be applied as described in the ``BufferOptions``.

Configuration for UDP datagrams buffering.

Used in: FilterConfig

• optional google.protobuf.UInt32Value max_buffered_datagrams = 1

  If set, the filter will only buffer datagrams up to the requested limit, and will drop new UDP datagrams if the buffer contains the max_buffered_datagrams value at the time of a new datagram arrival. If not set, the default value is 1024 datagrams.

• optional google.protobuf.UInt64Value max_buffered_bytes = 2

  If set, the filter will only buffer datagrams up to the requested total buffered bytes limit, and will drop new UDP datagrams if the buffer contains the max_buffered_datagrams value at the time of a new datagram arrival. If not set, the default value is 16,384 (16KB).