> # Authentication

> The ADO provider supports the following methods of authentication:

> - Anonymous. The SequeLink Server accepts connections from the SequeLink Client without verifying the client's identity.
> - Operating system user ID and password. The SequeLink Server verifies the identity of the SequeLink Client using a user ID and password that must be valid for the platform on which the SequeLink Server is running. If verified, the server accepts the user ID as the identity of the client and permits the connection.
> - Kerberos. Kerberos authentication uses Kerberos, a trusted third-party authentication service, to verify user identities. Kerberos authentication can take advantage of the user name and password maintained by the operating system to authenticate users to the database. This method requires knowledge of how to configure your Kerberos environment.
> - Integrated NT. This option is supported for connections between SequeLink Server for Windows servers and ODBC Clients, ADO Clients, and .NET Clients on Windows only. The SequeLink Server verifies the identity of the SequeLink Client using the client's Windows network logon credentials instead of a Windows user ID and password.

> For details on configuring authentication for SequeLink, see "Configuring SequeLink® Security on Linux, UNIX, and Windows".