TP-Link TD-W8960N User Manual page 73

TD-W8960N
Pre-Shared Key: Input the Pre-Shared key for Authentication. (For example: Input 12345678)
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 conmmunicate 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.
Main Mode: Select Main Mode to configure the standard negotiation parameters for IKE
phase1.
Aggressive Mode: Select Aggressive Mode to configure IKE phase1 of the VPN Tunnel to
carry out negotiation in a shorter amount of time. (Not Recommended-Less Secure)
Note:
The difference between the two is that aggressive mode will pass more information in fewer
packets, with the benefit of slightly faster connection establishment, at the cost of transmitting the
identities of the security firewall in the clear. When using aggressive mode, some configuration
parameters such as Diffie-Hellman groups, and PFS can not be negotiated, resulting in a greater
importance of having "compatible" configuration on both ends.
300Mbps Wireless N ADSL2+ Modem Router User Guide
66