是否可以通过端口443使用HTTP（非HTTPS）？

Question

我想知道是否可以通过TCP端口443传送纯HTTP（无SSL）？

尝试更改我的基于WCF的服务器的地址以使用端口443（但没有SSL）失败并显示以下消息：

Shunra.Common.Wcf.ShunraServiceHost - Open failed with exception
System.ServiceModel.AddressAlreadyInUseException: HTTP could not register URL http://+:443/NC/. Another application has already registered this URL with HTTP.SYS. ---> System.Net.HttpListenerException: Failed to listen on prefix 'http://+:443/NC/' because it conflicts with an existing registration on the machine.
   at System.Net.HttpListener.AddAllPrefixes()
   at System.Net.HttpListener.Start()
   at System.ServiceModel.Channels.SharedHttpTransportManager.OnOpen()
   --- End of inner exception stack trace ---
   at System.ServiceModel.Channels.SharedHttpTransportManager.OnOpen()
   at System.ServiceModel.Channels.TransportManager.Open(TransportChannelListener channelListener)
   at System.ServiceModel.Channels.TransportManagerContainer.Open(SelectTransportManagersCallback selectTransportManagerCallback)
   at System.ServiceModel.Channels.TransportChannelListener.OnOpen(TimeSpan timeout)
   at System.ServiceModel.Channels.HttpChannelListener.OnOpen(TimeSpan timeout)
   at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
   at System.ServiceModel.Dispatcher.ChannelDispatcher.OnOpen(TimeSpan timeout)
   at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
   at System.ServiceModel.ServiceHostBase.OnOpen(TimeSpan timeout)
   at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
   at System.ServiceModel.Channels.CommunicationObject.Open()
   at Shunra.Common.Wcf.ShunraServiceHost.Open() in c:\dev\windows\Common\Shunra.Common\Wcf\ShunraServiceHost.cs:line 65

这不是HTTP命名空间预留的问题，因为用户是管理员。

所以，我想知道是否对端口443进行了特殊处理，只允许使用HTTPS。

感谢。

Answer 1

请注意，错误消息显示为

  

另一个应用程序已使用HTTP.SYS注册此URL。

所以这似乎表明另一个应用程序已经使用了端口443，这就是问题所在。如果主机标题不同，则只能有多个应用程序在同一端口上侦听。