encapsulate_in_http2_connect.yaml

# This configuration takes incoming data on port 10000 and encapsulates it in a CONNECT
# request which is sent upstream port 10001.
# It can be used to test TCP tunneling as described in docs/root/intro/arch_overview/http/upgrades.rst
# and running `curl --x 127.0.0.1:10000 https://www.google.com`

admin:
  access_log_path: /tmp/admin_access.log
  address:
    socket_address:
      protocol: TCP
      address: 127.0.0.1
      port_value: 9903
static_resources:
  listeners:
  - name: listener_0
    address:
      socket_address:
        protocol: TCP
        address: 127.0.0.1
        port_value: 10000
    filter_chains:
    - filters:
      - name: tcp
        typed_config:
          "@type": type.googleapis.com/envoy.extensions.filters.network.tcp_proxy.v3.TcpProxy
          stat_prefix: tcp_stats
          cluster: "cluster_0"
          tunneling_config:
            hostname: host.com:443
  clusters:
    - name: cluster_0
      connect_timeout: 5s
      # This ensures HTTP/2 CONNECT is used for establishing the tunnel.
      typed_extension_protocol_options:
        envoy.extensions.upstreams.http.v3.HttpProtocolOptions:
          "@type": type.googleapis.com/envoy.extensions.upstreams.http.v3.HttpProtocolOptions
          explicit_http_config:
            http2_protocol_options: {}
      load_assignment:
        cluster_name: cluster_0
        endpoints:
          - lb_endpoints:
              - endpoint:
                  address:
                    socket_address:
                      address: 127.0.0.1
                      port_value: 10001