Chapter 24 L2TP VPN
SBG3500-N Series User’s Guide
300
Figure 156 VPN > L2TP VPN > Setup
The following table describes the fields in this screen.
Table 114 VPN > L2TP VPN > Setup
LABEL DESCRIPTION
Enable Select the checkbox to enable the SBG3500-N Series’s L2TP VPN function.
VPN Connection This is the WAN interface where L2TP VPN listens for a client connection request. It is
configured in the Default_L2TPVPN IPSec VPN rule in the VPN > IPSec > IPSec
Setup screen. See Chapter 22 on page 275 for information on IPSec VPN.
IP Address Pool Enter the pool of IP addresses that the SBG3500-N Series uses to assign to the L2TP
VPN clients.
Note: These addresses use a 24-bit netmask and should not conflict with any WAN, LAN,
DMZ, WLAN, or PPTP VPN subnet even if they are not in use.
Access Group
(Optional)
Specify up to 2 LAN groups (subnets) which a L2TP VPN client is allowed to access. If
none is specified, all LAN groups can be accessed. Enter the IP address and subnet
mask for the LAN group(s).
Authentication
Method
Select how the SBG3500-N Series authenticates a remote user before allowing access
to the L2TP VPN tunnel.
The authentication method has the SBG3500-N Series check a user’s user name and
password against the SBG3500-N Series’s local database, which is configured in the
Maintenance > User Account screen.
Keep Alive Timer The SBG3500-N Series sends a Hello message after waiting this long without receiving
any traffic from the remote user. The SBG3500-N Series disconnects the VPN tunnel if
the remote user does not respond.
DNS Server
(Optional)
Specify the IP addresses of DNS servers to assign to the remote users.
You can choose from one of the DNS servers from the list, or choose User Defined to
enter the static IP addresses for the first and second DNS servers manually.
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