TP-Link TL-ER6120 User Manual page 97

The following items are displayed on this screen:
General

Enable VPN-to-Internet:
Hello Interval:
Primary/Secondary
DNS
L2TP/PPTP Tunnel

Protocol:
Figure 3-63 L2TP/PPTP Tunnel
Specify whether to enable VPN-to-Internet function. If enabled, the
VPN client is permitted to access the LAN of the server and Internet.
Specify the interval to send hello packets.
Enter the Primary/Secondary DNS server address. The default IP is
"0.0.0.0", which means the LAN IP of the router is used as the DNS
server address.
Select the protocol for VPN tunnel. Options include L2TP and PPTP.
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