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To

  • yaml/json setting: to
  • Type: URL or list of URLs (must contain a scheme and hostname) with an optional weight
  • Schemes: http, https, tcp
  • Optional
  • Example: http://verify , https://192.1.20.12:8080, http://neverssl.com, https://verify.pomerium.com/anything/, ["http://a", "http://b"], ["http://a,10", "http://b,20"]

To is the destination(s) of a proxied request. It can be an internal resource, or an external resource. Multiple upstream resources can be targeted by using a list instead of a single URL:

- from: https://example.com
  to:
  - https://a.example.com
  - https://b.example.com

A load balancing weight may be associated with a particular upstream by appending ,[weight] to the URL. The exact behavior depends on your lb_policy setting. See Load Balancing for example configurations.

Must be tcp if from is tcp+https.

warning

Be careful with trailing slash.

With rule:

- from: https://verify.corp.example.com
  to: https://verify.pomerium.com/anything

Requests to https://verify.corp.example.com will be forwarded to https://verify.pomerium.com/anything, while requests to https://verify.corp.example.com/foo will be forwarded to https://verify.pomerium.com/anythingfoo.To make the request forwarded to https://httbin.org/anything/foo, you can use double slashes in your request https://httbin.corp.example.com//foo.

While the rule:

- from: https://verify.corp.example.com
  to: https://verify.pomerium.com/anything/

All requests to https://verify.corp.example.com/* will be forwarded to https://verify.pomerium.com/anything/*. That means accessing to https://verify.corp.example.com will be forwarded to https://verify.pomerium.com/anything/. That said, if your application does not handle trailing slash, the request will end up with 404 not found.

Either redirect or to must be set.