How configure Blazor Web server to listen IP addresses?

Question

I build a Blazor Web app server, run it on machine but it responds on localhost only, i.e. http://localhost:5000 but does not respond when I query it from an exrternal host http://myhostIP:5000 This myhostIP pinged ok. FW is off. In VS2019 in the project settings: App URL: https://localhost:5001;http://localhost:5000

How to configure Blazor Web server to listen (all) hosts IP addresses using appsetings.json without hardcoding?

user_566745 · Answer

Thanx David Fowler: That's really up to you. You can read custom configuration and set the appropriate URLs or hard code a URL into the application itself.

https://docs.microsoft.com/en-us/aspnet/core/fundamentals/host/web-host?view=aspnetcore-3.1#override-configuration

https://andrewlock.net/5-ways-to-set-the-urls-for-an-aspnetcore-app/ https://josephwoodward.co.uk/2017/02/many-different-ways-specifying-host-port-asp-net-core

user_9758687 · Answer

In my case I've added the entry https://*:5001 in the file launchSettings.json so that it looks like this:

"applicationUrl": "https://localhost:5001;http://localhost:5000;https://*:5001"

user_446279 · Answer

If you're using Kestrel, it is not designed to be used outside localhost. You can use a reverse proxy (like Nginx for instance) to expose your application to the outside world.

Image from MSDN:

How configure Blazor Web server to listen IP addresses?

3 Answers