The IPSec Pass Through pane lets you view previously configured IPSec Pass Through application inspection maps. An IPSec Pass Through map lets you change the default configuration values used for IPSec Pass Through application inspection. You can use an IPSec Pass Through map to permit certain flows without using an access list.
To enable ESP inspection, use the inspect ipsec-pass-thru command in class configuration mode. Class configuration mode is accessible from policy map configuration mode. To remove the configuration, use the no form of this command.
inspect ipsec-pass-thru
no inspect ipsec-pass-thru
For further information click this link.
http://www.cisco.com/en/US/docs/security/asdm/6_1f/user/guide/inspctrl.html#wp1184350
