使用Fleck的WebSocketServer遇到的一个问题

2024/5/22 11:11:46 [Warn] Failed to Authenticate System.AggregateException: One or more errors occurred. (Authentication failed, see inner exception.)
 ---> System.Security.Authentication.AuthenticationException: Authentication failed, see inner exception.
 ---> System.ComponentModel.Win32Exception (0x80090302): 要求的函数不受支持
   --- End of inner exception stack trace ---
   at System.Net.Security.SslStream.ForceAuthenticationAsync[TIOAdapter](TIOAdapter adapter, Boolean receiveFirst, Byte[] reAuthenticationData, Boolean isApm)
   at System.Net.Security.SslStream.ProcessAuthenticationWithTelemetryAsync(Boolean isAsync, Boolean isApm, CancellationToken cancellationToken)
   at System.Threading.Tasks.TaskToApm.End(IAsyncResult asyncResult)
   at System.Net.Security.SslStream.EndAuthenticateAsServer(IAsyncResult asyncResult)
   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
   --- End of inner exception stack trace ---
2024/5/22 11:11:46 [Warn] Failed to Authenticate System.AggregateException: One or more errors occurred. (Authentication failed, see inner exception.)
 ---> System.Security.Authentication.AuthenticationException: Authentication failed, see inner exception.
 ---> System.ComponentModel.Win32Exception (0x80090302): 要求的函数不受支持
   --- End of inner exception stack trace ---
   at System.Net.Security.SslStream.ForceAuthenticationAsync[TIOAdapter](TIOAdapter adapter, Boolean receiveFirst, Byte[] reAuthenticationData, Boolean isApm)
   at System.Net.Security.SslStream.ProcessAuthenticationWithTelemetryAsync(Boolean isAsync, Boolean isApm, CancellationToken cancellationToken)
   at System.Threading.Tasks.TaskToApm.End(IAsyncResult asyncResult)
   at System.Net.Security.SslStream.EndAuthenticateAsServer(IAsyncResult asyncResult)
   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
   --- End of inner exception stack trace ---

Unity端使用https://github.com/psygames/UnityWebSocket 在编辑器里连接服务器是正常的，但是发布到WebGL测试报以上错误，进行了一下测试

1、重置winsock，无效。执行命令：netsh winsock reset 并重启服务器。https://blog.csdn.net/yangguosheng/article/details/116010754

2、忽略检测证书，无效。https://blog.csdn.net/lizaijinsheng/article/details/127321758

后来浏览到https://rainmakerho.github.io/2020/05/15/2020007/和https://cloud.tencent.com/developer/ask/sof/106307479/answer/106010378，应该是SSL版本问题，

代码添加server.EnabledSslProtocols = System.Security.Authentication.SslProtocols.Tls12;

解决了问题