TP-Link TL-WR941HP User Manual page 69

3.4.8.1. Basic Security
Go to "Advanced→Security→Basic Security", and then you can configure the basic security
in this page.
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 VPN

protocols to pass through the router.
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, click Enable.
L2TP Passthrough - Layer Two Tunneling Protocol (L2TP) is the method used to

enable Point-to-Point sessions via the Internet on the Layer Two level. To allow L2TP
tunnels to pass through the router, click Enable.
IPSec Passthrough - Internet Protocol security (IPSec) is a suite of protocols for

ensuring private, secure communications over Internet Protocol (IP) networks,
TL-WR941HP 450Mbps High Power Wireless N Router
Figure 3-41 Basic Security
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