Thanks, it has helped… I find that I am at the same issue as (gRPC JWT Authentication silently failing in Istio [workaround] - #5 by KarlMutch). But I cannot seem to authenticate the JWT. I get the following allow_missing_or_failed set to true and the JWT is not really being validated.
[2020-05-28 13:24:51.357][26][debug][filter] [src/envoy/http/mixer/filter.cc:154] Called Mixer::Filter : setDecoderFilterCallbacks
[2020-05-28 13:24:51.358][26][debug][filter] [src/envoy/http/jwt_auth/jwt_authenticator.cc:82] Jwt authentication starts
[2020-05-28 13:24:51.358][26][debug][filter] [src/envoy/http/jwt_auth/jwt_authenticator.cc:243] Jwt authentication completed with: OK
[2020-05-28 13:24:51.358][26][debug][filter] [src/envoy/http/jwt_auth/jwt_authenticator.cc:246] The value of allow_missing_or_failed in AuthFilterConfig is: true
[2020-05-28 13:24:51.358][26][debug][filter] [src/envoy/http/jwt_auth/http_filter.cc:61] JwtVerificationFilter::onDone with status OK
[2020-05-28 13:24:51.358][26][debug][filter] [src/envoy/http/authn/filter_context.cc:81] No dynamic_metadata found for filter jwt-auth
[2020-05-28 13:24:51.358][26][debug][filter] [src/envoy/http/authn/origin_authenticator.cc:85] Origin authenticator failed