Draytek Vigor2620 Series, User Manual, Page: 225 / 610

Vigor2620 Series User’s Guide 213
scheme.

DES with Authentication-Use DES encryption
algorithm and apply MD5 or SHA-1 authentication
algorithm.

3DES without Authentication-Use triple DES
encryption algorithm and not apply any
authentication scheme.

3DES with Authentication-Use triple DES
encryption algorithm and apply MD5 or SHA-1
authentication algorithm.
 AES without Authentication-Use AES encryption
algorithm and not apply any authentication
scheme.

AES with Authentication-Use AES encryption
algorithm and apply MD5 or SHA-1 authentication
algorithm.
Advanced - Specify mode, proposal and key life of each IKE
phase, Gateway, etc.
The window of advance setup is shown as below:
IKE phase 1 mode -Select from Main mode and Aggressive
mode. The ultimate outcome is to exchange security
proposals to create a protected secure channel. Main mode
is more secure than Aggressive mode since more exchanges
are done in a secure channel to set up the IPsec session.
However, the Aggressive mode is faster. The default value in
Vigor router is Main mode.
 IKE phase 1 proposal-To propose the local available
authentication schemes and encryption algorithms to
the VPN peers, and get its feedback to find a match.
Two combinations are available for Aggressive mode
and nine for Main mode. We suggest you select the
combination that covers the most schemes.
 IKE phase 2 proposal-To propose the local available
algorithms to the VPN peers, and get its feedback to
find a match. Three combinations are available for both
modes. We suggest you select the combination that
covers the most algorithms.

IKE phase 1 key lifetime-For security reason, the
lifetime of key should be defined. The default value is
28800 seconds. You may specify a value in between 900
and 86400 seconds.
 IKE phase 2 key lifetime-For security reason, the
lifetime of key should be defined. The default value is
3600 seconds. You may specify a value in between 600
and 86400 seconds.
 Perfect Forward Secret (PFS)-The IKE Phase 1 key will
be reused to avoid the computation complexity in
phase 2. The default value is inactive this function.