What does HRESULT 0xC00D4276 (MF_E_NET_REDIRECT_TO_PROXY) mean?

 
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MF_E_NET_REDIRECT MF_E_NET_TOO_MANY_REDIRECTS

MF_E_NET_REDIRECT_TO_PROXY

MF_E_NET_REDIRECT_TO_PROXY indicates that the media connection was redirected through a proxy. The next failure, if any, is often proxy authentication, policy, or protocol compatibility rather than origin-server availability.

What to check

  • Verify the proxy selected for the target URL and the credentials available to the application.
  • Check that the proxy supports the required media protocol, not only ordinary web browsing.
  • Trace the redirect chain to ensure the client is not being bounced between proxies.

Microsoft: Binding to proxy servers dynamically

Microsoft: Network source authentication

Microsoft: Networking in Media Foundation


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