Some proxy servers (e.g. ZScaler) do not adhere to the RFC2617 (Section 1.2) by not accepting the Proxy-Authorisation header value when capitalised. These tokens should be case insensitive (NEGOTIATE vs Negotiate ) but in case of Zscaler Authentication fails as a result.
k0l0nell
commented
4 years ago
Some proxy servers (e.g. ZScaler) do not adhere to the RFC2617 (Section 1.2) by not accepting the Proxy-Authorisation header value when capitalised. These tokens should be case insensitive (NEGOTIATE vs Negotiate ) but in case of Zscaler Authentication fails as a result.