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.: News4Notes :: 07.03.2012 :: 09:06 :: Lotus Notes and Domino News :.
Status 400 "bad request" occurs logging in to Domino using SPNEGO
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by IBM Lotus Support

Attempts to connect to a Domino server over HTTP result in a status 400 error "Bad request" for some users who are authenticating to Domino through SPNEGO. When a web user connects to Domino, the browser sends an HTTP header with the SPNEGO login information in a Kerberos token. Domino reads the information and uses it to authenticate the user with Active Directory, and then it sets an LTPA token for the user, providing authentication with Domino. However, if the HTTP header is longer that 16KB, this will fail, resulting in a status 400 error. This is because Domino has a default HTTP header size limit of 16KB (16,384 bytes)...
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Had Cost us about one week of investigating the problem at the beginning of this year!

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