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300Mbps Wireless N Router TL-WR841N/TL-WR841ND
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4.9.1 Basic Security
Choose menu “Security → Basic Security”, you can configure the basic security in the screen
as shown in Figure 4-37.
Figure 4-38 Basic Security
¾ Firewall - A firewall protects your network from the outside world. Here you can enable or
disable the router’s firewall.
z 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.
¾ 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.
z 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.