Supported authentication schemes

IBM Installation Manager supports the following HTTP protocol authentication schemes: NTLM, DIGEST, and BASIC.

These schemes are supported when you accessHTTP and HTTPS servers and when you access an HTTP proxy. The NTLM scheme allows different types of challenge and response messages.

Installation Manager keeps passwords that are accepted for the HTTP and HTTPS servers until you close Installation Manager.

If we choose the Save password option, our credentials are stored. The saved credentials are used when you restart Installation Manager or IBM Packaging Utility. We can clear the stored credentials for a repository by clicking Clear Credentials on the Repositories preference page.

If we share an instance of Installation Manager with other users, see Install as an administrator, nonadministrator, or group.

Windows

You can use your current Windows login credentials by leaving all fields empty in the credentials prompt. If Installation Manager continues to prompt for Windows credentials when the correct credentials are entered, then Installation Manager might be configured incorrectly. The type of Windows authentication that is required and used on a Windows computer is configured using the registry key LMCompatibilityLevel. For information about the LMCompatibilityLevel registry key, see the support site for Microsoft.

UNIX platforms:

To change the type of authentication used, set the preference key http.ntlm.auth.kind. By default, http.ntlm.auth.kind is set to NTLM. For information about http.ntlm.auth.kind, see Silent installation preference keys.

Verifying authentication versions

Check the log entry to verify the version of authentication that is in use. To access the log file in Installation Manager, click File > View Log.

Find an INFO entry on Installation Manager initializing the HTTP mechanism. Table 1 contains the INFO entry messages for the different authentication schemes.

Authentication Scheme	INFO entry
NTLM	NTLM over HTTP is configured to use NTLM version 1 authentication.
NTLMv2	NTLM over HTTP is configured to use NTLM version 2 authentication.
LM	NTLM over HTTP is configured to use LM authentication

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