Draytek Vigor 3100 Series, User Manual, Page: 77 / 122

Vigor3100 Series User’s Guide 71
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.
For Main mode, the length of the ID is limited to 47 characters.
Callback Function (for I models) 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 remote
peer requires the Vigor router to callback, the local ISDN
number will be provided to the remote peer. Check here to
allow the Vigor router to send the ISDN number to the remote
router.
Allowed Dial-In Type Determine the dial-in connection with different types.
ISDN : Allow the remote ISDN dial-in connection. You can further set
up Callback function below. You should set the User Name and
Password of remote dial-in user below.