TP-Link TD-W9970 User Manual page 56

TD-W9970
 Authentication Method: Select Pre-Shared Key (recommended).
 Pre-Shared Key: Enter the Pre-shared Key for IKE authentication, and ensure both the two
peers use the same key. The key should consist of visible characters without blank space.
 Perfect Forward Secrecy: PFS is an additional security protocol.
We recommend you leave the Advanced Settings as default value.
 After complete the basic settings and click Save/Apply in both Device1 and Device2, PCs in
LAN1 could communicate with PCs in remote LAN2. (For example: You can ping the IP
address of PC2 which is 192.168.2.100 in PC1)

Note:
The VPN Servers Endpoint from both ends must use the same pre-shared keys and Perfect
Forward Secrecy settings.
Click Show Advanced Settings and then you can configure the Advanced Settings.
300Mbps Wireless N USB VDSL2 Modem Router User Guide
Figure 4-32
Figure 4-33
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