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Using a computer behind an private corporate proxy, I would like to know if the proxy use or is compatible with NTLM authentication protocol. Any solution working on Windows and/or Linux would be accepted.

mxdsp
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    You will in the response headers sent by the proxy that an NTLM authentication is requested. Just send a wget or curl command to the proxy and you'll see what is returned. – Eugène Adell Oct 01 '19 at 16:55
  • @EugèneAdell Can you provide an example of what that would look like? No matter what I do (provide un/pw or not) I just get "407 Proxy Authentication Required" – dainichi Jan 13 '23 at 03:34
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    @dainichi The proxy is answering with such a header `Proxy-Authenticate: NTLM`. If using an ordinary browser, open the _developer tools_ and check. Source : [RFC2616 §10.4.8](https://www.rfc-editor.org/rfc/rfc2616.txt) , [davenport](https://davenport.sourceforge.net/ntlm.html#theType1Message) – Eugène Adell Jan 13 '23 at 21:35

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