Draytek Vigor3900 Series User Manual page 74

If you choose PPTP as IPv4 protocol type, click the PPTP Tab to open the following
page:
Available parameters are listed as follows:
Item
PPTP Over
Server Address
Username
Password
MTU/MRU
Debug
Always On
Connection
Detection Mode
Description
Usually ISP dynamically assigns IP address to you each time
you connect to it and request. In some case, your ISP
provides service to always assign you the same IP address
whenever you request. In this case, you can fill in this IP
address in the Fixed IP field. Please contact your ISP
before you want to use this function.
Choose a proper protocol, Static or DHCP.
Type the IP address of PPTP server offered by your ISP.
Type the user name offered by your ISP.
Type the password offered by your ISP.
Type the value of MTU/MRU. The default value is 1452.
Click Enable to display the PPTP debug message in syslog.
The default setting is Disable.
Enable – Click it to enable the function of Always On. The
router will keep network connection all the time.
Disable – Click it to disable the function of Always On.
Select a detecting mode for this WAN interface. There are
two ways PING and HTTP supported in Vigor router for
you to choose to send the request out.
66 Vigor3900 Series User's Guide