Draytek VigorPro 5510 Series User Manual page 173

Callback Function
(for i models only)
VigorPro5510 Series User's Guide
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.
Local ID - In Aggressive mode, Local ID is on behalf of the
IP address while identity authenticating with remote VPN
server. The length of the ID is limited to 47 characters.
The callback function provides a callback service as a part of
PPP suite only for the ISDN dial-in user. The router owner
will be charged the connection fee by the telecom.
Require Remote to Callback-Enable this to let the router to
require the remote peer to callback for the connection
afterwards.
Provide ISDN Number to Remote-In the case that the
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