D-Link DI-524UP - Manual (Page 63)

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Ping Test The Ping Test is used to send Ping packets to test if a
computer is on the Internet. Enter the IP Address that
you wish to Ping, and click Ping.
Block WAN Ping Discard Ping from WAN side If you choose to block
WAN Ping, the WAN IP Address of the DI-524UP will
not respond to pings. Blocking the Ping may provide
some extra security from hackers. Click Enabled to
block the WAN ping.
SPI Mode SPI or Stateful Packet Inspection is a type of firewall
that protects your network against hacker attacks by
analyzing packets to ensure that only authorized
packets will be allowed to enter your network. To
enable this function, click the Enabled radio button.
This function is enabled by default.
Multicast Streamming The Internet Group Management Protocol (IGMP)
snooping allows the Router to recognize IGMP queries
and reports sent between PCs on your LAN and an
IGMP host. When the IGMP Proxy is enabled, the
Router can open or close a port to a specific PC based
on IGMP messages passing through the Router.
UPNP Settings You may enable the Universal Plug n’ Play function
here by clicking the Enabled radio button.
VPN Pass-Through The DI-524UP supports VPN (Virtual Private Network)
pass-through for both PPTP (Point-to-Point Tunneling
Protocol) and IPSec (IP Security). Once VPN
pass-through is enabled, there is no need to open up
virtual services. Multiple VPN connections can be made
through the DI-524UP. This is useful when you have
many VPN clients on the LAN network.
PPTP Select enabled or disabled.
IPSec
Select enabled or disabled.
WAN Select This section allows the user to set the wire speed over
which the router will transmit packets. The user has
three options:
100 Mbps – Clicking this radio button will set the wire
speed at 100 megabytes per second.
10 Mbps – Clicking this radio button will set the wire
speed at 10 megabytes per second.