Draytek Vigor2920 Series User Manual page 216

Item
Available settings are explained as follows:
Item
Vigor2920 Series User's Guide
Description
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.
Description
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