Can we explicitely define port for Kestrel (dotnet.exe) when hosting in IIS as OutOfProcess.

Amit 731

I use <AspNetCoreHostingModel>OutOfProcess</AspNetCoreHostingModel> within my .NET Core Project File. Then I publish my code to folder and hosted it on IIS.

When I check Process Explorer search for dotnet.exe. I found it always runs on some random port. I checked Environment variable ASPNETCORE_PORT within process explorer.

My question is, is there any way I can fix this port. I don't want IIS or .NET Core application randomly assign port to my kestrel or dotnet.exe.

AgaveJoe 27,696 Reputation points

2022-11-08T11:27:01.707+00:00

See the official docs.

Out-of-process hosting with IIS and ASP.NET Core
Amit 731 Reputation points

2022-11-09T03:46:15.857+00:00

I have seen that document but not able to get how to provide static port for kestrel
Sam Wu-MSFT 7,286 Reputation points Microsoft Vendor

2022-11-09T09:48:12.5+00:00

@Amit

<AspNetCoreHostingModel>OutOfProcess</AspNetCoreHostingModel> within my .NET Core Project File.
I found it always runs on some random port. I checked Environment variable ASPNETCORE_PORT within process explorer

Does this problem only occur when you set OutOfProcess? Usually If no ports are specified, Kestrel binds to http://localhost:5000.
Amit 731 Reputation points

2022-11-09T15:01:14.503+00:00

Hi @Sam Wu-MSFT

This is not a problem, this is the expected behavior. As per Microsoft "The module forwards the requests to Kestrel on a random port for the app. The random port isn't 80 or 443.".

My concern is, what if I don't want to use a random port when using OutOfProcess Hosting? Is there any way to achieve this?
Sam Wu-MSFT 7,286 Reputation points Microsoft Vendor

2022-11-11T09:57:02.08+00:00

@Amit According to searching and looking up, this should not be possible, there is no place to specify the port.

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Can we explicitely define port for Kestrel (dotnet.exe) when hosting in IIS as OutOfProcess.