keyset-2.1.192.in-addr.arpa.

openswan

$ORIGIN .
2.1.192.in-addr.arpa	604800	IN KEY	256 3 1 (
					AQO+DlJcxjF3tc9lKN8HmP5SzTDOY91V0Fye
					/lHqMOzevsb3CMd60PN5yGBJKdia+eG+zJgj
					7w1Kp0kDzBzpTtXZ
					) ; key id = 20181