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页码 122
TL-MR3220
3G/3.75G Wireless Lite N Router
 
-67- 
the use of cryptographic security services. To allow IPSec tunnels to pass through the 
Router, keep the default, Enabled
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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.   
z
 
FTP ALG - To allow FTP clients and servers to transfer data across NAT, keep the 
default Enable.   
z
 
TFTP ALG - To allow TFTP clients and servers to transfer data across NAT, keep the 
default Enable. 
z
 
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