ASP.NET Core
A set of technologies in the .NET Framework for building web applications and XML web services.
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Visual Studio: Web Server Unable to Listen on Port
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Jana Rumpf
0
Reputation points
Hello,
I am encountering an issue with Visual Studio running on a Microsoft Windows Server 2022 Datacenter Evaluation, hosted as a Hyper-V virtual machine. When starting my ASP.NET Core application, I get an error indicating that the web server cannot listen on the specified port.
Here’s what I’ve already checked:
- Firewall rules (both inbound and outbound) are correctly configured for the port.
- The port appears to be free, as verified using
netstat. - Visual Studio is running with administrative privileges.
- The issue persists whether using the default port settings or custom ports specified in the
launchSettings.json.
Additionally:
- The SQL Server database is accessible via the Server Explorer in Visual Studio.
- It is also reachable through SQL Server Management Studio (SSMS).
Does anyone have suggestions on what could be causing this issue or how I might resolve it? Thanks in advance for your help!Hello,
I am encountering an issue with Visual Studio running on a Microsoft Windows Server 2022 Datacenter Evaluation, hosted as a Hyper-V virtual machine. When starting my ASP.NET Core application, I get an error indicating that the web server cannot listen on the specified port.
Here’s what I’ve already checked:
- Firewall rules (both inbound and outbound) are correctly configured for the port.
- The port appears to be free, as verified using
netstat. - Visual Studio is running with administrative privileges.
- The issue persists whether using the default port settings or custom ports specified in the
launchSettings.json.
Additionally:
- The SQL Server database is accessible via the Server Explorer in Visual Studio.
- It is also reachable through SQL Server Management Studio (SSMS).
Does anyone have suggestions on what could be causing this issue or how I might resolve it? Thanks in advance for your help!
Thank you.
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{count} votes
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Erland Sommarskog 117.1K Reputation points MVP2024-11-25T21:31:15.7833333+00:00 I am confused. You say that the web server cannot listen to the port you have specified, and then you start talking about SQL Server? The normal reason that an application can use a port would that another application is using it.
What is the exact error message?
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