## HTTP頭部清理 出于安全原因，Envoy將根據請求傳入的HTTP頭（被"清理"的頭部），來判斷是內部還是外部請求。根據頭部key進行清理，可能會導致添加，刪除或修改頭部。 最終，都是由`x-forwarded-for`標頭，請求被認定是內部的還是外部的（請仔細閱讀鏈接部分，因為關于Envoy填充頭部過程復雜，并取決于[use_remote_address](../../v1APIreference/Networkfilters/HTTPconnectionmanager.md)設置）。 Envoy可能會對以下頭部進行清理： - [x-envoy-decorator-operation](../HTTPfilters/Router.md) - [x-envoy-downstream-service-cluster](../HTTPconnectionmanager/HTTPheadermanipulation.md) - [x-envoy-downstream-service-node](../HTTPconnectionmanager/HTTPheadermanipulation.md) - [x-envoy-expected-rq-timeout-ms](../HTTPfilters/Router.md) - [x-envoy-external-address](../HTTPconnectionmanager/HTTPheadermanipulation.md) - [x-envoy-force-trace](../HTTPconnectionmanager/HTTPheadermanipulation.md) - [x-envoy-internal](../HTTPconnectionmanager/HTTPheadermanipulation.md) - [x-envoy-max-retries](../HTTPfilters/Router.md) - [x-envoy-retry-grpc-on](../HTTPfilters/Router.md) - [x-envoy-retry-on](../HTTPfilters/Router.md) - [x-envoy-upstream-alt-stat-name](../HTTPfilters/Router.md) - [x-envoy-upstream-rq-per-try-timeout-ms](../HTTPfilters/Router.md) - [x-envoy-upstream-rq-timeout-alt-response](../HTTPfilters/Router.md) - [x-envoy-upstream-rq-timeout-ms](../HTTPfilters/Router.md) - [x-forwarded-client-cert](../HTTPconnectionmanager/HTTPheadermanipulation.md) - [x-forwarded-for](../HTTPconnectionmanager/HTTPheadermanipulation.md) - [x-forwarded-proto](../HTTPconnectionmanager/HTTPheadermanipulation.md) - [x-request-id](../HTTPconnectionmanager/HTTPheadermanipulation.md) ## 返回 - [上一級](../HTTPconnectionmanager.md) - [首頁目錄](../../README.md)