Why I Cannot establish L2TP over IPSec tunnel successfully?
Posted by on 27 January 2012 01:48 PM

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. 
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