SMC Networks SMC7004VBR V.2 - Manual (Page 42)

Navigating the Web-based Administration
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[Advanced Firewall Settings]
This section allows you to configure several advanced
features for the Barricade™ Firewall.
The following features can be set on this page:
[Advanced Firewall Protection:]
Enable/Disable SPI section of firewall.
[Discard Ping from WAN:]
When this feature is enabled, any host on the WAN
cannot ping this product. This helps avoid unnecessary
attacks from the WAN side because your connection is
invisible. It is recommended that you enable this option
for security.
[VPN Pass-through:]
Enable this option if you are using a PPTP, L2TP
or IPSec VPN connection.