ProGet 2025 - Nuget.org connector fails after update

[m.karing_2439]

Hello,

I updated our ProGet instance to 2025.1. It went more or less smoothly (only the outdated InedoHub caused a failure). After the update I noticed that the connector to nuget.org started showing errors.

Specifially this exception shows up:

Unable to GET from connector "nuget.org"; using cached copy.

System.Net.WebException: The SSL connection could not be established, see inner exception.
 ---> System.Net.Http.HttpRequestException: The SSL connection could not be established, see inner exception.
 ---> System.Security.Authentication.AuthenticationException: Cannot determine the frame size or a corrupted frame was received.
   at System.Net.Security.SslStream.GetFrameSize(ReadOnlySpan`1 buffer)
   at System.Net.Security.SslStream.EnsureFullTlsFrameAsync[TIOAdapter](CancellationToken cancellationToken, Int32 estimatedSize)
   at System.Runtime.CompilerServices.PoolingAsyncValueTaskMethodBuilder`1.StateMachineBox`1.System.Threading.Tasks.Sources.IValueTaskSource<TResult>.GetResult(Int16 token)
   at System.Net.Security.SslStream.ReceiveHandshakeFrameAsync[TIOAdapter](CancellationToken cancellationToken)
   at System.Net.Security.SslStream.ForceAuthenticationAsync[TIOAdapter](Boolean receiveFirst, Byte[] reAuthenticationData, CancellationToken cancellationToken)
   at System.Net.Http.ConnectHelper.EstablishSslConnectionAsync(SslClientAuthenticationOptions sslOptions, HttpRequestMessage request, Boolean async, Stream stream, CancellationToken cancellationToken)
   --- End of inner exception stack trace ---
   at System.Net.Http.ConnectHelper.EstablishSslConnectionAsync(SslClientAuthenticationOptions sslOptions, HttpRequestMessage request, Boolean async, Stream stream, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.ConnectAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.CreateHttp11ConnectionAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.AddHttp11ConnectionAsync(QueueItem queueItem)
   at System.Threading.Tasks.TaskCompletionSourceWithCancellation`1.WaitWithCancellationAsync(CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.SendWithVersionDetectionAndRetryAsync(HttpRequestMessage request, Boolean async, Boolean doRequestAuth, CancellationToken cancellationToken)
   at System.Net.Http.AuthenticationHelper.SendWithAuthAsync(HttpRequestMessage request, Uri authUri, Boolean async, ICredentials credentials, Boolean preAuthenticate, Boolean isProxyAuth, Boolean doRequestAuth, HttpConnectionPool pool, CancellationToken cancellationToken)
   at System.Net.Http.DiagnosticsHandler.SendAsyncCore(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
   at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
   at System.Net.Http.DecompressionHandler.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
   at System.Net.Http.HttpClient.<SendAsync>g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken)
   at System.Net.HttpWebRequest.SendRequest(Boolean async)
   at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   --- End of inner exception stack trace ---
   at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
--- End of stack trace from previous location ---
   at System.Net.WebRequest.GetResponseAsync()
   at Inedo.ProGet.GlobalExtensions.GetResponseAsync(HttpWebRequest request, CancellationToken cancellationToken)
   at Inedo.ProGet.Feeds.Connector.GetDirectResponseAsync(String url, CancellationToken cancellationToken)
   at Inedo.ProGet.Feeds.Connector.GetCachedResponseAsync(String url, CancellationToken cancellationToken)

::Connector Warning on 20.06.2025 16:23:58::

The other connectors, for example to pypi.org are working fine. Only the nuget.org one is failing.

What could be the reason for this?

Best regards,
Martin

[stevedennis]

Hi @m-karing_2439,

It looks like this is a network-related issue: "Cannot determine the frame size or a corrupted frame was received."

There are no changes in ProGet 2025 that would cause something like this, but it's possible that a firewall or something else is interfering with the communication. The executable name changed from ProGet.Service.exe to proget.exe, and we've seen some "anti-virus" tools require a new execption be made.

No idea why it would work for PyPi, however. Hope that at least points in the right direction.

Thanks,
Steve