Support `X-Forwarded-Port` header

[PSanetra]

I tried to overwrite the X-Forwarded-Port header in a policy, but it seems like envoy ignores this policy. Therefore it would be nice to allow enabling the envoy append_x_forwarded_port option explicitly. Also see the envoy documentation: https://www.envoyproxy.io/docs/envoy/latest/configuration/http/http_conn_man/headers#x-forwarded-port

My contour configuration:

policy:
  request-headers:
    set:
      X-Forwarded-Port: "443"

Environment:

• Contour version: 1.27.0

[PSanetra]

In my case I forgot to enable policies for ingresses. So the following did work:

policy:
  applyToIngress: true
  request-headers:
    set:
      X-Forwarded-Port: "443"

Still it would probably be nice if contour could set that header automatically.

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[github-actions[bot]]

The Contour project currently lacks enough contributors to adequately respond to all Issues.

This bot triages Issues according to the following rules:

• After 60d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, the Issue is closed

You can:

• Mark this Issue as fresh by commenting
• Close this Issue
• Offer to help out with triage

Please send feedback to the #contour channel in the Kubernetes Slack