Authority Override

Demonstrates overriding the HTTP Host header sent to a specific upstream cluster, including requests received over HTTP/2

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Category: Setup-dependent integration
Task: Demonstrates overriding the HTTP Host header sent to a specific upstream cluster, including requests received over HTTP/2

Prerequisites: The external service, credentials, or certificates referenced by this configuration.

Run it: Use ghcr.io/praxis-proxy/praxis:0.7.2 and follow the first reverse-proxy tutorial to mount and start the configuration.

This configuration comes from the selected release. The example has not been run here; external services are not bundled.

Download the source file.

# Per-Cluster Upstream Authority Override
#
# Demonstrates overriding the HTTP Host header sent to a specific
# upstream cluster, including requests received over HTTP/2.
#
# The proxy replaces the downstream Host header with the configured
# authority value before forwarding to the upstream. TLS SNI is
# independent and configured separately via `tls.sni`.
#
listeners:
  - name: default
    address: "0.0.0.0:8080"
    filter_chains: [main]

filter_chains:
  - name: main
    filters:
      - filter: router
        routes:
          - path_prefix: "/"
            cluster: backend
      - filter: load_balancer
        clusters:
          - name: backend
            endpoints:
              - "localhost:9000"
            http:
              authority: "api.example.com"

insecure_options:
  allow_private_endpoints: true # example proxies to local backends
  allow_private_upstreams: true # "localhost" resolves to loopback at connection time