DIR-842V2  AC1200 Wi-Fi Gigabit Router 
User Manual 
Configuring via Web-based Interface 
 
 
 
Parameter  Description 
Enable PFS 
Move the switch to the right  to enable the PFS option (Perfect
Forward  Secrecy).  If  the  switch  is  moved  to  the  right,  a  new
encryption key exchange will be used upon establishing the IPsec
tunnel. This option enhances the security level of data transfer, but
increases the load on DIR-842V2. 
Specify connection 
port 
Move  the  switch  to  the  right  to  change  the  port  used  for  data
exchange with the other party enter the needed value in the Port
filed displayed. By default, the value 
is specified. 
When all needed settings are configured, click the APPLY button. 
After clicking the button, the window for additional configuration of the connection opens. 
If you want to use this WAN connection to access the Internet, select the to the Internet choice of 
the radio button. Then select the existing connection which will be used to access the PPTP/L2TP 
server or click the CREATE CONNECTION button. 
If you have already configured the connection to the Internet and you want to use this WAN 
connection  only to connect to  the virtual  private  network, select the  to the virtual private 
network choice of the radio button. 
Click the CONTINUE button. 
After creating a connection of the L2TP over IPsec type, on the Functions / Advanced / IPsec 
page, in the Status section, the current state of the IPsec tunnel is displayed.