Draytek Vigor2762 series User Manual page 231

Item Description
Medium-Authentication Header (AH) means data will be
authenticated, but not be encrypted. By default, this option
is invoked. You can uncheck it to disable it.
High-Encapsulating Security Payload (ESP) means payload
(data) will be encrypted and authenticated. You may select
encryption algorithm from Data Encryption Standard (DES),
Triple DES (3DES), and AES.
Local ID - Specify a local ID to be used for Dial-in setting in
the LAN-to-LAN Profile setup. This item is optional and can
be used only in IKE aggressive mode.
After finishing all the settings here, please click OK to save the configuration.
Vigor2762 Series User's Guide 221