SSO Between Intranet and Portal

Hi friends,

Can anyone please help me out in implementing SSO between Intranet and Netweaver Portal. My requirement is the users who are all accessing the Intranet should also access the portal by loggin into it. How should i implement SSO between SAP and NON-SAP ( Company Intranet ).

Please help me out on this..

Regards

Sireesha.