Why Can’t I establish L2TP over IPSec tunnel successfully?

Please check your network setup by following these procedures:

1. Does either VPN client (e.g. WinXP on PC) or VPN server (e.g. Vigor 2910 ) connect to the internet through a NAT device?
2. If you are remote dial-in user and use DrayTek “Smart VPN Client” utility, please be sure to click the “Configure” button in Step 0 of the setup.

   

3. Check that the IPSec service status is active from Start -› Settings -› Control Panel -› Administrative Tools -› Services. If not, “Start” IPSec Service and establish L2TP over IPSec VPN tunnel again.