Netgear UTM9S – ProSECURE Unified Threat Management (UTM) Appliance with DSL and Wireless modules Manual De Referência

In the IKE SA Parameters section of the screen, locate the DPD fields, and complete the 
fields as explained the following table:

Click Apply to save your settings.

Configure NetBIOS Bridging with IPSec VPN

Windows networks use the Network Basic Input/Output System (NetBIOS) for several basic 
network services such as naming and neighborhood device discovery. Because VPN routers 
do not usually pass NetBIOS traffic, these network services do not function for hosts on 
opposite ends of a VPN connection. To solve this problem, you can configure the UTM to 
bridge NetBIOS traffic over the VPN tunnel. 

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Select VPN > IPSec VPN > VPN Policies. The VPN Policies screen displays (see 

Enable Dead Peer 
Detection

Select the Yes radio button to enable DPD. When the UTM detects an IKE 
connection failure, it deletes the IPSec and IKE SA and forces a reestablishment 
of the connection. You need to specify the detection period in the Detection 
Period field and the maximum number of times that the UTM attempts to 
reconnect in the Reconnect after failure count field.

Detection Period

The period in seconds between consecutive
DPD R-U-THERE messages, which are sent only when the 
IPSec traffic is idle. The default setting is 10 seconds.

Reconnect after 
failure count

The maximum number of DPD failures before the UTM tears 
down the connection and then attempts to reconnect to the 
peer. The default setting is 3 failures.