To set up Ory Oathkeeper to forward requests on your local server without Docker, you would need to follow these steps: 1. Install Ory Oathkeeper. You can find the installation guide [here](https://www.ory.sh/docs/oathkeeper/install). 2. Configure Ory Oathkeeper. You can create a configuration file

config.yaml

as shown in the [configuration guide](https://www.ory.sh/docs/oathkeeper/configure-deploy#configure). This file will specify the ports for the proxy and the API, and enable the necessary authenticators, authorizers, and mutators. 3. For gRPC, you can use Ory Oathkeeper as a gRPC middleware. This is done by embedding it into your Go application. The gRPC traffic will then be handled by the middleware as if it were a standalone Ory Oathkeeper instance. Here is an example of how to do this:

go import (    "<http://github.com/ory/oathkeeper/middleware|github.com/ory/oathkeeper/middleware>"    "<http://google.golang.org/grpc|google.golang.org/grpc>"   )      func setup() {    oathkeeperMW, err := middleware.New(ctx, middleware.WithConfigFile("path/to/config"))    if err != nil {     return nil, nil, fmt.Errorf("failed to create oathkeeper middleware: %w", err)    }        s := grpc.NewServer(     grpc.UnaryInterceptor(mw.UnaryInterceptor()),     grpc.StreamInterceptor(mw.StreamInterceptor()),    )        // register your service to s, start the server, ...   }

(Source: [gRPC middleware](https://www.ory.sh/docs/oathkeeper/grpc-middleware)) 4. You would also need to define rules for your service. These rules specify how requests are handled, which authenticators, authorizers, and mutators are used, and where the request is forwarded to. Here is an example of a rule:

json {     "id": "some-id",     "upstream": {       "url": "<http://my-backend-service>"     },     "match": {       "url": "<http://oathkeeper-proxy:4455/my-service/whatever>",       "methods": ["GET"]     },     "authenticators": [       {         "handler": "anonymous"       }     ],     "authorizer": {       "handler": "allow"     },     "mutators": [       {         "handler": "noop"       }     ]   }

(Source: [Operating modes](https://www.ory.sh/docs/oathkeeper#operating-modes)) Please note that the URLs and other parameters in the configuration and rules should be adjusted to match your specific setup.

If you prefer to use Ory Oathkeeper as a standalone service without embedding it as a gRPC middleware in your Go application, you can do so by following these steps: 1. Install Ory Oathkeeper. You can find the installation guide [here](https://www.ory.sh/docs/oathkeeper/install). 2. Configure Ory Oathkeeper. You can create a configuration file

config.yaml

as shown in the [configuration guide](https://www.ory.sh/docs/oathkeeper/configure-deploy#configure). This file will specify the ports for the proxy and the API, and enable the necessary authenticators, authorizers, and mutators. 3. Define rules for your service. These rules specify how requests are handled, which authenticators, authorizers, and mutators are used, and where the request is forwarded to. Here is an example of a rule:

json {     "id": "some-id",     "upstream": {       "url": "<http://my-backend-service>"     },     "match": {       "url": "<http://oathkeeper-proxy:4455/my-service/whatever>",       "methods": ["GET"]     },     "authenticators": [       {         "handler": "anonymous"       }     ],     "authorizer": {       "handler": "allow"     },     "mutators": [       {         "handler": "noop"       }     ]   }

(Source: [Operating modes](https://www.ory.sh/docs/oathkeeper#operating-modes)) 4. Start the Ory Oathkeeper service. You can do this by running the command

oathkeeper serve

. Please note that the URLs and other parameters in the configuration and rules should be adjusted to match your specific setup.