Netgear UTM25-100NAS ユーザーズマニュアル

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Virtual Private Networking Using IPsec Connections

9. Enter the settings as explained in 

.

10. Click on the disk icon to save the configuration, or select File > Save from the Security Policy 

Editor menu.

11. Close the VPN ProSafe VPN client.

To test the connection:

1. Right-click on the VPN client icon in the Windows toolbar and click Connect. The connection 

policy you configured appears; in this example “My Connections\ModeConfigTest”.

2. Click on the connection. For this example, the message “Successfully connected to 

MyConnections/ModeConfigTest” is displayed within 30 seconds, and the VPN client icon in 
the toolbar displays “On”.

3. From the client PC, ping a computer on the UTM LAN.

In some cases, you might not want a VPN tunnel to be disconnected when traffic is idle; for 
example, when client-server applications over the tunnel cannot tolerate the tunnel establishment 
time. If you require a VPN tunnel to remain connected, you can use the Keepalive and Dead Peer 
Detection (DPD) features to prevent the tunnel from being disconnected and to force a 
reconnection if the tunnel disconnects for any reason.

For DPD to function, the peer VPN device on the other end of the tunnel must also support DPD. 
Keepalive, though less reliable than DPD, does not require any support from the peer device.

Select Phase 1 Negotiation 
Mode

Select the Aggressive Mode radio button.

Enable Perfect Forward 
Secrecy (PFS)

Select the Enable Perfect Forward Secrecy (PFS) checkbox. From the 
pull-down menu below, select Diffie-Hellman Group 2.

Enable Replay Detection

Leave the default setting, which is selection of the Enable Replay 
Detection checkbox.