TP-LINK TL-MR3420 User Manual

 

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Point-to-Point sessions via the Internet on the Layer 2 level. To allow L2TP tunnels to 

pass through the Router, keep the default, Enabled. 

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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. 

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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.   

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FTP ALG - To allow FTP clients and servers to transfer data across NAT, keep the 

default Enable.   

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TFTP ALG - To allow TFTP clients and servers to transfer data across NAT, keep the 

default Enable. 

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H323 ALG - To allow Microsoft NetMeeting clients to communicate across NAT, keep 

the default Enable. 

Click the Save button to save your settings. 

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 4-45.