Hello
Static (inside,outside) 212.x.x.x 192.168.12.2
access-list outside_in permit ip any host 212.x.x.x
access-group outside_in in interface outside
Let me know if you have any other question,
Julio
Julio Carvajal
Senior Network Security and Core Specialist
CCIE #42930, 2xCCNP, JNCIP-SEC