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NS_E_PROXY_TIMEOUT
NS_E_PROXY_TIMEOUT: network-stage diagnosis
NS_E_PROXY_TIMEOUT (0xC00D2EE5) means the proxy did not obtain a response from the origin side within the allowed time.
Evidence to preserve
Record the proxy endpoint, destination URL, elapsed timeout, proxy-to-origin response timing and whether the client-to-proxy connection remained established.
Focused verification
Test the same origin through the same proxy and compare with another reachable origin. This separates a slow/unreachable origin path from failure to connect to the proxy itself.
Technical references
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