SMC Networks BARRICADE N SMCWBR14-N5 User Manual page 81

Figure 65: Basic Security
◆ 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
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dynamic packet filtering) helps to prevent cyber attacks by tracking
states 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)
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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
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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
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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
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| Configuring the Router
C 4
HAPTER
Security