What is negotiate ntlm

KlimczakM KlimczakM 1 1 gold badge 2 2 silver badges 7 7 bronze badges. Add a comment. Active Oldest Votes. Here is a snippet from the frame that sends authentication information from the client: 23 Compare Request.

Improve this answer. Greg Askew Greg Askew I'm getting the first characters as oXcw, any idea what that means? Maybe a newer version of kerberos? MarkAdamson Me too, mine is oYG JohnC JohnC 2, 3 3 gold badges 11 11 silver badges 15 15 bronze badges. Michael Hampton k 39 39 gold badges silver badges bronze badges. Richard E.

Silverman Richard E. Negotiate selects Kerberos unless it cannot be used by one of the systems involved in the authentication or the calling application did not provide sufficient information to use Kerberos.

A server that uses the Negotiate package is able to respond to client applications that specifically select either the Kerberos or NTLM security provider. However, a client application must know that a server supports the Negotiate package to request authentication using Negotiate. A server that does not support Negotiate cannot always respond to requests from clients that specify Negotiate as the SSP. Otherwise or if left unset the port is not used. For example, assume that an intranet has a DNS configuration like.

By default, Chrome does not allow this. You can use the AuthNegotiateDelegateWhitelist policy to enable it for the servers. Delegation does not work for proxy authentication. On Android, Negotiate is implemented using an external Authentication app provided by third parties. The AuthAndroidNegotiateAccountType policy is used to tell Chrome the Android account type provided by the app, hence letting it find the app. The first time a Negotiate challenge is seen, Chrome tries to dlopen one of several possible shared libraries.

If it is unable to find an appropriate library, Chrome remembers for the session and all Negotiate challenges are ignored for lower priority challenges. A status code status response can also carry a "WWW-Authenticate" response header containing the final leg of an authentication. In this case, the gssapi-data will be present. If this function indicates success, the response can be used by the application. Otherwise, an appropriate action, based on the authentication status, should be taken.

For example, the authentication could have failed on the final leg if mutual authentication was requested and the server was not able to prove its identity. In this case, the returned results are suspect. It is not always possible to mutually authenticate the server before the HTTP operation. POST methods are in this category. Any returned code other than a success 2xx code represents an authentication error. If a containing a "WWW-Authenticate" header with "Negotiate" and gssapi-data is returned from the server, it is a continuation of the authentication request.

A client may initiate a connection to the server with an "Authorization" header containing the initial token for the server.