TP-LINK TL-WR2543ND ユーザーズマニュアル

 

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VPN - VPN Passthrough must be enabled if you want to allow VPN tunnels using VPN 

protocols to pass through the Router. 

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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, click Enable. 

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L2TP Passthrough - Layer Two Tunneling Protocol (L2TP) is the method used to 

enable Point-to-Point sessions via the Internet on the Layer Two level. To allow L2TP 

tunnels to pass through the Router, click Enable. 

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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, click Enable. 

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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, click Enable. 

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

Enable. 

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

Enable. 

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RTSP ALG - To allow some media player clients to communicate with some streaming 

media servers across NAT, click Enable. 

Click the Save button to save your settings. 

Choose menu “Security  → Advanced Security”, and then you can protect the Router from 

being attacked by TCP-SYN Flood, UDP Flood and ICMP-Flood in the screen as shown in