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Virtual Private Networking Using IPSec and L2TP Connections
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ProSafe Wireless-N 8-Port Gigabit VPN Firewall FVS318N
Authentication Method Select one of the following radio buttons to specify the authentication method:
• Pre-shared key. A secret that is shared between the wireless VPN firewall and
the remote endpoint.
• RSA-Signa
ture. Uses the active self-signed certificate that you uploaded on the
Certificates screen (see Manage VPN Self-Signed Certificates on page 316).
The pre-shared key is masked out when you select RSA-Signature.
Pre-shared key A key with a minimum length of 8 characters and no more
tha
n 49 characters. Do not use a double quote (''), single
quote('), or space in the key.
Diffie-Hellman (DH)
Group
The DH Group sets the strength of the algorithm i
n bits. The higher the group, the
more secure the exchange. From the drop-down list, select one of the following
three strengths:
• Grou
p 1 (768 bit).
• Gro
up 2 (1024 bit). This is the default setting.
• Group 5 (1536 bit).
Note: Ensure that the DH Group is confi
gured identically on both sides.
SA-Lifetime (sec) The period in seconds for which the IKE SA is valid. When the period times out,
the next rekeying occurs. The default is 28800 seconds (8 hours).
Enable Dead Peer
De
tection
Note: See also
Configure Keep-Alives
and Dead Peer
Detection on
page 259.
Select a radio button to specify whether Dead Peer Detection (DPD) is enabled:
• Ye
s. This feature is enabled. When the wireless VPN firewall 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 wireless VPN firewall
attempts to reconnect in the Reconnect after failure count field.
• No.
This feature is disabled. This is the default setting.
Detection Period The period in seconds between consecutive
DPD R-U-THERE messages, which are sent only when the
IPSec traf
fic is idle.
Reconnect after
fai
lure count
The maximum number of DPD failures before the wireless
VPN firewall tears down the connection and then attempts to
reconnect to the peer. The default is 3 failures.
Table 52. Add IKE Policy screen settings (continued)
Setting Description