User’s Manual of WNRT-627
-87-
The page includes the following fields:
Object
Description
Firewall
A firewall protects your network from the outside world. Here you can
enable or disable the Router’s firewall.
SPI Firewall -
SPI (Stateful Packet Inspection, also known as
dynamic packet filtering) helps to prevent cyber attacks by
tracking more state per session. It validates that the traffic
passing through the session conforms to the protocol. SPI
Firewall is enabled by factory default. If you want all the
computers on the LAN exposed to the outside world, you can
disable it.
VPN
VPN Passthrough must be enabled if you want to allow VPN tunnels
using IPSec, PPTP, or L2TP protocols to pass through the Router’s
firewall.
PPTP Passthrough -
Point-to-Point Tunneling Protocol (PPTP)
allows the Point-to-Point Protocol (PPP) to be tunneled through
an IP network. To allow PPTP tunnels to pass through the
Router, keep the default,
Enabled
.
L2TP Passthrough
-
Layer 2 Tunneling Protocol (L2TP) is the
method used to enable Point-to-Point sessions via the Internet on
the Layer 2 level. To allow L2TP tunnels to pass through the
Router, keep the default,
Enabled
.
IPSec Passthrough
-
Internet Protocol Security (IPSec) is a suite
of protocols for ensuring private, secure communications over
Internet Protocol (IP) networks, through the use of cryptographic
security services. To allow IPSec tunnels to pass through the
Router, keep the default,
Enabled
.
ALG
It is recommended to enable Application Layer Gateway (ALG)
because ALG allows customized Network Address Translation (NAT)
traversal filters to be plugged into the gateway to support address and
port translation for certain application layer "control/data" protocols
such as FTP, TFTP, H323 etc.
FTP ALG -
To allow FTP clients and servers to transfer data
across NAT, keep the default
Enable.
TFTP ALG -
To allow TFTP clients and servers to transfer data
