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1. Go to the Network page. In the Security > Basic section, configure the following
parameters and click Apply.
SPI Firewall
Check the Enable box to use the SPI Firewall function. If forwarding
rules are enabled at the same time, the device will give priority to meet
forwarding rules.
Ping
Select and enable the ping forbidden function.
WAN Ping Forbidden: Enable or disable this function. With this option
enabled, the device will not reply the ping request originates from
internet. By default, it is disabled.
LAN Ping Forbidden: Enable or disable this function. With this option
enabled, the device will not reply the ping request originates from local
network.
VPN
Select and enable the VPN function.
A VPN is created by establishing a virtual point-to-point connection
through the use of dedicated connections, virtual tunneling protocols, or
traffic encryptions. Through VPN you can access your private network
over internet. A virtual private network connection across the internet
is similar to a wide area network (WAN) link between sites. From a user
perspective, the extended network resources are accessed in the same
way as resources available within the private network. When hosts in the
local area network want to visit the remote virtual private network using
virtual tunneling protocols, the corresponding VPN protocol should be
enabled.
PPTP Passthrough: PPTP (Point-to-Point Tunneling Protocol) allows
the Point-to-Point Protocol (PPP) to be tunneled through an IP (Internet
Protocol) network. Check the box to allow PPTP tunnels to pass through
the Device.
L2TP Passthrough: L2TP (Layer Two Tunneling Protocol) is the method
used to enable Point-to-Point connections via the internet on the Layer
Two level. Check the box to allow L2TP tunnels to pass through the
Device.
IPSec Passthrough: IPSec (Internet Protocol Security) is a suite of
protocols for ensuring private, secure communications over IP (Internet
Protocol) networks, through the use of cryptographic security services.
Check the box to allow IPSec tunnels to pass through the Device.
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