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MF_E_NET_ERROR_FROM_PROXY
MF_E_NET_ERROR_FROM_PROXY means the proxy successfully received the client request but failed while contacting the upstream media server. This separates proxy-to-origin failure from a local client connection issue.
What to check
- Inspect proxy logs for upstream DNS, connection, TLS, or response errors.
- Verify the proxy route and credentials used for the origin server.
- Test origin reachability from the proxy host, not only from the client.
Microsoft: Binding to proxy servers dynamically
Microsoft: Windows Media Server cache proxy functionality
Microsoft: Networking in Media Foundation
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