Siebel Portal Framework Guide > Integrating External Content > Understanding Portal Agents >
Portal Agents and Authentication Strategies
Portal Agents can be configured to support different authentication strategies:
- Simple Portal Agents. External application does not require any authentication parameters.
- Single Sign-On Portal Agents. External application requires authentication parameters.
- NCSA-based Portal Agents send a user name and password as part of the URL in plain text. Note that NCSA is no longer widely used as an authentication mechanism.
- Form-based Portal Agents send authentication parameters as part of the body portion of the HTTP request.
For more information about authentication, see Siebel Security Guide.