Usually it’s not a big deal, when a HTTP request to a remote server is not working on a desktop Windows machine. There are plenty of useful tools, that could help in the process:
one, which work like a proxy and dump the whole traffic, that we might be interested in (Fiddler would be the best example here)
others, that interact with the TCP/IP stack itself and look much deeper for sent packets (like WireShark or Microsoft Message Analyzer - unfortunately retired as of 2020-01-20).
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