![Securing Microservices with IdentityServer4, OAuth2 and OpenID Connect fronted by Ocelot API Gateway | by Mehmet Özkaya | aspnetrun | Medium Securing Microservices with IdentityServer4, OAuth2 and OpenID Connect fronted by Ocelot API Gateway | by Mehmet Özkaya | aspnetrun | Medium](https://miro.medium.com/max/1190/1*PtqjLPgt80_A2MuOI5k0DQ.png)
Securing Microservices with IdentityServer4, OAuth2 and OpenID Connect fronted by Ocelot API Gateway | by Mehmet Özkaya | aspnetrun | Medium
![c# - Failed to load http://localhost:5000/.well-known/openid-configuration: No 'Access-Control-Allow-Origin' header is present on the requested resource - Stack Overflow c# - Failed to load http://localhost:5000/.well-known/openid-configuration: No 'Access-Control-Allow-Origin' header is present on the requested resource - Stack Overflow](https://i.stack.imgur.com/hkw3E.jpg)
c# - Failed to load http://localhost:5000/.well-known/openid-configuration: No 'Access-Control-Allow-Origin' header is present on the requested resource - Stack Overflow
![Unable to obtain configuration from: '/.well-known/openid-configuration' when hosted on IIS · Issue #628 · openiddict/openiddict-core · GitHub Unable to obtain configuration from: '/.well-known/openid-configuration' when hosted on IIS · Issue #628 · openiddict/openiddict-core · GitHub](https://user-images.githubusercontent.com/1043865/41760045-da92f47e-75f1-11e8-8833-0d22f2bd1857.png)
Unable to obtain configuration from: '/.well-known/openid-configuration' when hosted on IIS · Issue #628 · openiddict/openiddict-core · GitHub
![Blazor WebAssembly standalone - Authentication and authorization with IdentityServer4 · nahid farrokhi Blazor WebAssembly standalone - Authentication and authorization with IdentityServer4 · nahid farrokhi](https://nahidfa.com/images/blazor-oidc.png)
Blazor WebAssembly standalone - Authentication and authorization with IdentityServer4 · nahid farrokhi
Detect "DB Down" and return an error in ".well-known/openid-configuration" · Issue #4040 · IdentityServer/IdentityServer4 · GitHub
![asp.net core - Identity Server 4 not setting `Access-Control-Allow-Origin` for `.well-known/openid-configuration` - Stack Overflow asp.net core - Identity Server 4 not setting `Access-Control-Allow-Origin` for `.well-known/openid-configuration` - Stack Overflow](https://i.stack.imgur.com/FD7Wn.png)