Access linux-hosted ASP.NET Core 2.x webapp (without nginx)

Question

My ASP.NET Core 2.1 webapp works perfectly on my dev setup. Now I want to test it in production.

The production server is Ubuntu 18. I followed the instructions. I don't want to setup nginx yet, just do some quick tests, and the instructions say:

"Either configuration—with or without a reverse proxy server—is a valid and supported hosting configuration for ASP.NET Core 2.0 or later apps".

So I built and published my project: dotnet publish --configuration Release. Then on the server:

install the dotnet runtime
copied files to server (/var/www/myapp)
opened ports: sudo uwf allow 5000/tcp 80/tcp
run dotnet MyApp.dll (also tried sudo dotnet MyApp.dll)

It runs without errors/warnings, and says it's listening on http://localhost:5000.

On my local machine I tried http://serveripaddress (and http://serveripaddress:5000) but get nothing ("can't connect"). I can access that server with ssh, sftp, etc - only http isn't working.

What am I doing wrong?

zhimin · Accepted Answer · 2018-09-06 13:55:23Z

6

the host default bind is 127.0.0.1 , so you can only access the app locally. if you want to access it from Network, please add --urls parameter. for example :

for development, you can run:

dotnet run --urls http://0.0.0.0:5000

and for deployed project, you can run:

dotnet MyApp.dll --urls http://0.0.0.0:5000

The dotnet core sdk I use is version 2.1.400.

edited Sep 6, 2018 at 13:55

answered Sep 6, 2018 at 9:55

zhimin

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5 Comments

lonix Over a year ago

That doesn't work on 2.1 - I think they removed that option. See my answer.

zhimin Over a year ago

may be they adjust the parameter name, I will try it , there should be a parameter can change the binding address.

lonix Over a year ago

My way works, but I prefer your way - I hope there is a new parameter for this.

zhimin Over a year ago

@lonix , I have tried, it works, please see my edited answer.

lonix Over a year ago

Doesn't work for me. I ran dotnet --info which shows host is version 2.1.3. I remember reading somewhere that urls is no longer supported. I'm not sure why it works for you but not me. Thanks anyway.

lonix · Accepted Answer · 2023-02-10 04:22:10Z

4

Found the problem. I needed to use:

ASPNETCORE_URLS="http://0.0.0.0:5000" sudo dotnet MyApp.dll

Then it logs Now listening on: http://0.0.0.0:5000. And I can access that from a remote client.

edited Feb 10, 2023 at 4:22

answered Sep 6, 2018 at 9:54

lonix

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2 Comments

TMOTTM Over a year ago

where exactly are you entering this "command"? are you sure sudo is correct?

lonix Over a year ago

Sorry but I don't remember - that was a long time ago, and the sdk has been upgraded since then. However I'm sure it's a typo and the sudo should come after the environment variable.

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