Kerberos Autentication

I confirm the help documents about Kerberos Autentication from SAP.

http://help.sap.com/saphelp_nw04/helpdata/en/43/65c078b39b0398e10000000a1553f6/content.htm

http://help.sap.com/saphelp_nw2004s/helpdata/en/43/4bd58c6c5e5f34e10000000a1553f6/content.htm

Our Enterprise Portal System'S OS is UNIX.

Do I have to prepare Windows Server and install J2ee??

We use Using Header Variables for User Authentication for Single Sign on to Enterprise Portal.

I read help documents that Using Header Variables for User Authentication is depicated.

I want to implement Kerberos Autentication in UNIX.

Best regards

Yuki