TP-Link Technologies Co. Ltd. TDW8968V1 Manuale Utente

 

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Figure 4-17 

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Virtual Private Network (VPN) - VPN Passthrough must be enabled if you want to allow VPN 
tunnels using VPN protocols to pass through the Modem 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 Modem 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 Modem 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 
Modem Router, click Enable. 

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Application Layer Gateway (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 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. 

Click the Save button to save your settings. 

Choose “Advanced Setup”Æ“DSL Settings”, you can select the DSL Modulation Type and 
Annex Type in the next screen. The DSL feature can be selected when you meet the physical 
connection problem. Please check the proper settings with your Internet service provider.