Security; Basic Security - TP-Link TW-MR3220 User Manual

4.9 Security

There are four submenus under the Security menu as shown above: Basic Security,
Advanced Security, Local Management and Remote Management. Click any of them, and
you will be able to configure the corresponding function.
4.9.1

Basic Security

Choose menu "Security → Basic Security", you can configure the basic security in the
screen as shown below.
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.
TL-MR3220 3G/4G Wireless N Router User Guide
-50-