Draytek Vigor3300 Series User Manual page 118

For Advanced Configuration
Click Advanced tab. This page allows you to set advanced configuration for the
specified policy. The following page of default configuration will be shown:
Key Lifetime (main) The renegotiated period of the IKE Phase1 keying channel of a
Proposal (main)
connection. The acceptable range is from 5 to 480 minutes (8
hours).
The proposed encryption and/or authentication algorithms for
IKE Phase1 negotiation. There are several proposals offered in
this page with combination of three types of algorithms:
Encryption algorithms - DES/3DES/AES
Authentication algorithms - MD5/SHA1
DH (Diffie-Hellman) Group -
MODP768/MODP1024/MODP1536.
112
Vigor3300 Series User's Guide