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SSPI and SPN canonicalization

From: Brandon Ewing <>
Date: Mon, 7 Jan 2019 11:23:41 -0600

By default, MIT kerberos will perform DNS canonicalziation of the SPN,
controlled by the dns_canonicalize_hostname value in libdefaults:

However, Windows SSPI does perform any canonicalization at all that I can
find. Chrome/Chromium appears to perform the canonicalization itself, also
controllable via config:

Does curl have a similar config setting to control this behavior? If not,
can it be added?

Brandon Ewing                                     (


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Received on 2019-01-07