Operation Manual

Chapter 13 Firewall
NBG-418N v2 User’s Guide
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The following table describes the labels in this screen.
Table 54 Security > Firewall > Services
LABEL DESCRIPTION
ICMP Internet Control Message Protocol (ICMP) is a message control and error-reporting
protocol between a host server and a gateway to the Internet. ICMP uses Internet
Protocol (IP) datagrams, but the messages are processed by the TCP/IP software and
directly apparent to the application user.
Respond to Ping
on WAN
The NBG-418N v2 will not respond to any incoming Ping requests when Disable is
selected. Select Enable to reply to incoming WAN Ping requests.
VPN Passthrough Select the checkbox to enable the advanced pass through features:
• PPTP Passthrough: Select this option to allow the NBG-418N v2 to pass through
VPN traffic using PPTP.
• L2TP Passthrough: Select this option to enable computers on your LAN to make
L2TP VPN connections to servers on the Internet.
• IPSEC Passthrough: Select this option to allow the NBG-418N v2 to pass through
VPN traffic using the IPsec protocol.
Apply Click Apply to save the settings.
Reset Click Reset to start configuring this screen again.