Draytek Vigor2920n User Manual page 222

When you choose L2TP, you will see the following graphic:
When you choose L2TP over IPSec (Nice to Have) or L2TP over IPSec (Must), you
will see the following graphic:
Profile Name
VPN Dial-Out Through
Vigor2920 Series User's Guide
Type a name for such profile. The length of the file is
limited to 10 characters.
Use the drop down menu to choose a proper WAN
interface for this profile. This setting is useful for dial-out
only.
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