Pfsense 2.1.5 tunnel wth srx100

[bhawk6901]

Never had any issues getting ipsec between pfsense boxes, even gre over ipsec was pretty simple but here i am stuck with an srx device. Have tried various options but to no avail

If anyone can please guide me step by step how to make a tunnel with srx. Please consider me a total newbie and explain everything

so i have setup this simple sceneraio as shown in attachment and have verified end to end connectivity
porblem i think is due to the confusion created by not being able to assign ip directly to a physical interface and having to create a logical unit first assigning ip to that logical unit AND the presence of an st0 interface.

If any one can please guide me now the configuration steps on the both boxes, i shall be highly grateful