Envoy remove server header. HTTPRoute rules cannot use both filter types at once.

Envoy remove server header. To address the scenario when the backend service adds this header, use the Route's response_headers_to_remove field. It can be added in any position in the filter chain and used as downstream or upstream HTTP filter. 5. ), you can extend Envoy with custom HTTP filters to introduce specific logic for manipulating headers, performing authentication, or implementing custom behaviors based on the HTTP request or response data. Feb 11, 2021 · 2 How can I remove the server header generated by Istio ? In Istio 1. The filter can be configured to apply the header mutations to the request, response, or both. There's an HCM field "server_header_transformation" - I suspect setting it to PASS_THROUGH may solve your problem. 8. A Oct 10, 2022 · The server_header_transformation property set to PASS_THROUGH basically says don’t touch the server header according to the envoy docs, and we remove it afterwards via the route config’s option to remove response headers. istio) actions when HTTP specification suggests it. Mar 25, 2025 · While Envoy provides a series of built-in HTTP filters (like for routing, load balancing, etc. Dec 15, 2020 · response_headers_to_remove removes headers sent by upstream, but Envoy often adds its own server header. g. Aug 11, 2025 · When routing a web application through Istio, the HTTP responses may include the header " server: istio-envoy ". x-envoy-external-address is not set or overwritten for internal requests. Feb 21, 2022 · Their recommendation is for us to remove any server banners from response headers. Sep 7, 2021 · By changing this to PASS_THROUGH, Envoy won't add this header. istio. HTTPRoute rules cannot use both filter types at once. 6 I had an Istio EnvoyFilter, but that doesn't seem to work anymore in Istio 1. To remove the server header from the HTTP responses, apply the following EnvoyFilter configuration on the affected cluster: name: ef-removeserver. . Currently, Envoy Gateway only supports core HTTPRoute filters which consist of RequestRedirect and RequestHeaderModifier at the time of this writing. I'm trying to remove x-envoy-* headers (like x-envoy-upstream-service-time) from client/downstream (end-user) response using response_headers_to_remove but then it does not log their values in the access logs. Jul 19, 2022 · Change the header configuration in virtual service to remove below server information. headers: response: remove: - Server This will remove the server: istio-envoy information from This is a filter that can be used to add, remove, append, or update HTTP headers. 2. How can I do that? Thank for your help! May 7, 2019 · Envoy treats some headers as special, including this server header and content-length, and it overrides any plugin (e. 4 days ago · The HTTPRoute resource can modify the headers of a request before forwarding it to the upstream service. This may be flagged by security or compliance teams during audits. Per the lengthy discussion on XFF, this can get quite complicated, so Envoy simplifies this by setting x-envoy-external-address to the trusted client address if the request is from an external client. To learn more about HTTP routing, refer to the Gateway API documentation. According to envoyproxy/envoy#14421, it seems like we will need to set the server_header_transformation param on the HTTPConnectionManager top PASS_THROUGH. apiVersion: networking. io/v1alpha3 kind: EnvoyFilter metadata: name: dgp-headerstrip-server namespace: istio-system spec: configPatches: - applyTo: NETWORK_FILTER match: listener Oct 19, 2020 · Envoy proxy add some sensitive header, eg: Server, X-Envoy-Upstream-Service-Time I want to disable or remove those headers. tdeor efn ijui kcfaq uboyk msysosw xltj appfw umlbnd xtfa