Netgear UTM25 – ProSECURE Unified Threat Management (UTM) Appliance User Manual

gateway. This method is referred to as static extended authentication. However, this 
defeats the purpose of extended authentication.

Select Configuration > Save or press Ctrl + S.

Your settings are saved.

You can configure a redundant gateway. An alternate gateway is used under the following 
circumstances:

The VPN Client cannot contact the primary gateway to establish a tunnel. After several 
attempts (determined by the value in the Retransmission field—the default is 
5

  attempts—in the Parameters page (see 

the VPN Client uses the alternate gateway as the new tunnel endpoint. The interval 
between two attempts is about 10 seconds.

A tunnel is established with the primary gateway with the Dead Pear Detection (DPD) 

feature but the primary gateway stops responding to DPD messages.

The same connection rules apply if the alternate gateway goes down 
or stops responding. This means that the VPN Client could switch 
between the primary and alternate gateways until you save the 
configuration or close and exit the VPN Client.

If the primary gateway can be reached but tunnel establishment fails (that is, VPN 
configuration errors occur), the VPN Client does not attempt to establish a tunnel with the 
alternate gateway. In this case, you must first resolve the configuration errors.



On the client computer desktop, double-click the VPN Client shortcut 

.

The VPN Configuration page displays.

In the VPN Tunnel Tree pane, right-click the name of the IKE configuration.

The Authentication page displays.