The default retry times are 5. The system will terminate the VPN tunnel if the
Heart Beat is still failure over the retry default.
The VPN Heart Beat detection and DPD features are both used to provide a stabile VPN solution for
customers. The difference between them is that we can use the Heart Beat detection in a non IPSec
protocol. With the Heart Beat detection, we can monitor the VPN tunnel and make sure whether the
tunnel exists and smooth or not. However, with the DPD feature, it is only available under the IPSec
protocol.
10.1.2. PPTP Server
It supports the PPTP of Window XP/ 2000 to create point-to-point tunnel protocol for single- device users to
create VPN connection.
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