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AuthType Enumeration

The AuthType enumeration is used to specify the authentication method to use on a connection.

Namespace:  System.DirectoryServices.Protocols
Assembly:  System.DirectoryServices.Protocols (in System.DirectoryServices.Protocols.dll)

public enum AuthType

Member nameDescription
AnonymousIndicates that the connection should be made without passing credentials. The value is equal to 0.
BasicIndicates that basic authentication should be used on the connection. The value is equal to 1.
DigestIndicates that the Digest Access Authentication should be used on the connection. The value is equal to 4.
DpaIndicates that Distributed Password Authentication (DPA) should be used on the connection. The value is equal to 6.
ExternalIndicates an external method will be used to authenticate the connection. The value is equal to 8.
KerberosIndicates that Kerberos authentication should be used on the connection. The value is equal to 9.
MsnIndicates that it is authenticated by "Microsoft Network Authentication Service". The value is equal to 7.
NegotiateIndicates that Microsoft Negotiate authentication should be used on the connection. The value is equal to 2.
NtlmIndicates that Windows NT Challenge/Response (NTLM) authentication should be used on the connection. The value is equal to 3.
SicilyIndicates a negotiation mechanism (Sicily) will be used to choose MSN, DPA or NTLM. This should be used for LDAPv2 servers only. The value is equal to 5.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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