Thank you Dimitar and Donka. I have asked basis team to download SSO 2.0 from link you mentioned.
Meanwhile I was playing with authentication scheme and HeaderVariableLoginModule (till we get SPNego configured).
As shown in below screenshots I created new authscheme "zhras" which uses template "vinod" with shown login modules.
I also updated default authscheme property to "zhras" keeping everything else as default. But Portal does not log me in even when I pass header parameter - REMOTE_USER="XYZ"
However if I keep default authscheme property to "default" and change
"default login context" value from "ticket" to "vinod", HeaderVariableLoginModule works fine.
Why does it not work when I change authscheme?
Regards,
Vinod