Advanced Security - TP-Link TL-WR740N - 150Mbps Wireless Lite N Router IEEE 802.11n 802.11g 802.11b Built-in User Manual

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 across NAT, keep the
default Enable.
H323 ALG - To allow Microsoft NetMeeting clients to communicate across NAT, keep
the default Enable.
Click the Save button to save your settings.

4.9.2 Advanced Security

Choose menu "Security → Advanced Security", you can protect the Router from being
attacked by TCP-SYN Flood, UDP Flood and ICMP-Flood in the screen as shown in Figure 4-39.
TL-WR740N/TL-WR741ND
Figure 4-39 Advanced Security
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150Mbps Wireless N Router