D-Link DI-524UP - Manual (Page 25)

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MTU Enter an MTU value only if required by your ISP. Otherwise,
leave it at the default setting.
Connect Mode Allows the user to choose a method of connecting to the ISP.
Always-On will keep the router connected through Idle times.
Manual will require the user to connect manually using the
router anytime a connection to the ISP has timed out.
Connect-on-demand will instruct the router to connect to the
ISP anytime information is sent from the connected computer
on the LAN.
Click Apply to set any changes made to the memory of the router.
Home > WAN > Others > PPTP
PPTP Choose between Dynamic and Static IP.
IP Address Enter the IP address of the router for a static IP entry. Dynamic
IP requires no input here.
Subnet Mask Enter the Subnet Mask address of the router for a static IP
entry. Dynamic IP requires no input here.
Gateway Enter the gateway address here. This is the IP address of the
ISP server.
Server IP Enter the IP address of the PPTP’s server computer. This is
how the user will become authenticated to use PPTP.
PPTP Account Enter the name of the PPTP account as provided to you by
your ISP.
PPTP Password Enter the PPTP password as provided to you by your ISP.
PPTP or Point-to-Point Protocol is a safe
method of sending information between
VPN’s securely using encryption over PPP.
You, as the client, need to enter the correct
information that the server has in order to
create that secure tunnel. Using Dynamic IP,
the router will set your basic IP parameters
for you, such as the IP Address, Subnet
Mask and Gateway. For Static IP, this
information must be set manually by the
user. All information in this window should be
provided by your ISP.