Netgear UTM25-100NAS Reference Manual - Page 266

ProSecure Unified Threat Management UTM10 or UTM25 Reference Manual 4. Enter the settings as explained in Table 7-20. Table 7-20. Keepalive Settings Item General Enable Keepalive Description (or Subfield and Description) Select the Yes radio button to enable the Keepalive feature. Periodically, the UTM sends ping packets to the remote endpoint to keep the tunnel alive. You must enter the ping IP address, detection period, and the maximum number of times that the UTM attempts to reconnect (see below). Ping IP Address The IP address that the UTM pings. The address must be of a host that can respond to ICMP ping requests. Detection period The period in seconds between the ping packets. The default setting is 10 seconds. Reconnect after The number of consecutive missed responses that are failure count considered a tunnel connection failure. The default setting is 3 missed responses. 5. Click Apply to save your settings. Configuring Dead Peer Connection The Dead Peer Detection (DPD) feature maintains the IKE SA by exchanging periodic messages with the remote VPN peer. To configure DPD on a configured IKE policy: 1. Select VPN > IPSec VPN from the menu. The IPsec VPN submenu tabs appear with the IKE Policies screen in view (see Figure 7-20 on page 7-23). 2. In the List of IKE Policies table, click the edit table button to the right of the IKE policy that you want to edit. The Edit IKE Policy screen displays. (Figure 7-31 on page 7-55 shows only the top part of the screen with the General section). 7-56 Virtual Private Networking Using IPsec Connections v1.0, September 2009