NETGEAR SRX5308 - ProSafe® Quad WAN Gigabit SSL VPN Firewall Reference Manual page 191

Table 5-16. Add IKE Policy Settings for a Mode Config Configuration (continued)
Item
Remote
Identifier Type
IKE SA Parameters
Note: Generally, the default settings work well for a Mode Config configuration.
Encryption Algorithm
Authentication
Algorithm
Authentication Method Select Pre-shared key as the authentication method, and enter a key in the
Diffie-Hellman (DH)
Group
SA-Lifetime (sec)
Enable Dead Peer
Detection
Note: See also
"Configuring
Keepalives and Dead
Peer Detection" on
page 5-55.
Virtual Private Networking Using IPsec Connections
ProSafe Gigabit Quad WAN SSL VPN Firewall SRX5308 Reference Manual
Description (or Subfield and Description)
From the drop-down list, select FQDN.
Note: Mode Config requires that the remote end is defined by an FQDN.
Identifier
From the drop-down list, select the 3DES algorithm to negotiate the security
association (SA).
From the drop-down list, select the SHA-1 algorithm to be used in the VPN
header for the authentication process.
Pre-shared key field.
Pre-shared key
The DH Group sets the strength of the algorithm in bits. From the drop-down
list, select Group 2 (1024 bit).
The period in seconds for which the IKE SA is valid. When the period times
out, the next rekeying must occur. The default is 28800 seconds (8 hours).
However, for a Mode Config configuration, NETGEAR recommends
3600 seconds (1 hour).
Select a radio button to specify whether or not Dead Peer Detection (DPD) is
enabled:
• Yes. This feature is enabled. When the VPN firewall detects an IKE
connection failure, it deletes the IPsec and IKE SA and forces a
reestablishment of the connection. You must specify the detection period in
the Detection Period field and the maximum number of times that the VPN
firewall attempts to reconnect in the Reconnect after failure count field.
• No. This feature is disabled. This is the default setting.
Detection Period
Reconnect after
failure count
v1.0, April 2010
Enter the FQDN for the remote end. This must be an FQDN
that is not used in any other IKE policy. In this example, we
are using srx_remote2.com.
A key with a minimum length of 8 characters and no more
than 49 characters. Do not use a double quote (") in the
key. In this example, we are using 12345678910.
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.
The maximum number of DPD failures before the VPN
firewall tears down the connection and then attempts to
reconnect to the peer. The default is 3 failures.
5-49