Perle Systems IOLAN SCS - Manual (Page 227)

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VPN
L2TP/IPsec
Many operating systems support L2TP/IPsec VPN tunnels, however, Windows XP requires this VPN
tunnel protocol. When L2TP/IPsec is enabled, the IOLAN will listen for L2TP/IPsec VPN tunnel
requests.
When you enable L2TP/IPsec, you are requiring that all access to the IOLAN go through the
L2TP/IPsec tunnel, so you must configure any exceptions first (see
Exceptions on page 228 for more
information on exceptions) or you will not be able to access the IOLAN through the network unless
you are configured to go through the L2TP/IPsec tunnel (you can still access the IOLAN through the
Console port).
Field Descriptions
Configure the following parameters:
Allow L2TP/IPsec
connections When enabled, the IOLAN listens for L2TP/IPsec VPN tunnel connections.
Note: to allow non-VPN tunnel connections to the IOLAN, you must create
entries in the VPN Exceptions list.
Default: Disabled
Local IP Address The IPv4 address that the IOLAN will listen on for L2TP/IPsec connections. If
the default value (0.0.0.0) is kept, the IOLAN will use the
Default Gateway
value (if no Default Gateway is specified, L2TP/IPsec VPN connections will
not be established).
Default: 0.0.0.0
Authentication
Method Specify the authentication method that will be used between VPN peers to
authenticate the VPN tunnel.
Data Options:
z Shared Secret—A text-based secret that is used to authenticate the IPsec
tunnel (case sensitive).
z X.509 Certificate—X.509 certificates are used to authenticate the IPsec
tunnel. When using this authentication method, you must include the
signing authority’s certificate information in the SSL/TLS CA list and
download it to the IOLAN.
Default: Shared Secret