Start the Web browser, and access the machine by entering its IP address.
Click [IPsec Settings].
Click the [IPsec Policy List] tab.
Select the number of the setting you want to modify in the list, and then click [Change].
Modify the IPsec related settings as necessary.
Enter the administrator password, and then click [Apply].
Click the [IPsec Global Settings] tab, and then select [Active] in [IPsec Function].
If necessary, specify [Default Policy], [Broadcast and Multicast Bypass], and [All ICMP Bypass] also.
Enter the administrator password, and then click [Apply].