User's Manual

Chapter 13 Firewall
NBG-460N User’s Guide
183
You can also use this screen to enable service blocking, enter/delete/modify the
services you want to block and the date/time you want to block them.
Click Security > Firewall > Services. The screen appears as shown next.
Figure 124 Security > Firewall > Services
The following table describes the labels in this screen.
Table 63 Security > Firewall > Services
LABEL DESCRIPTION
ICMP Internet Control Message Protocol 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
The NBG-460N will not respond to any incoming Ping requests when
Disable is selected.
Select LAN to reply to incoming LAN Ping requests. Select WAN to
reply to incoming WAN Ping requests. Otherwise select LAN & WAN to
reply to all incoming LAN and WAN Ping requests.