Services Screen; Figure 84 Security > Firewall > Services; Table 57 Security > Firewall > Services - ZyXEL Communications NBG-318S - V3.60 User Manual

Chapter 14 Firewall
Table 56 Security > Firewall > General
LABEL
Log
Apply
Reset

14.4 Services Screen

Click Security > Firewall > Services. The screen appears as shown next.
If an outside user attempts to probe an unsupported port on your NBG318S, an ICMP response
packet is automatically returned. This allows the outside user to know the NBG318S exists.
Use this screen to prevent the ICMP response packet from being sent. This keeps outsiders
from discovering your NBG318S when unsupported ports are probed.
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.
Figure 84 Security > Firewall > Services
The following table describes the labels in this screen.
Table 57 Security > Firewall > Services
LABEL
ICMP
Respond to Ping
on
154
DESCRIPTION
Select whether to create a log for packets that are traveling in the selected
direction when the packets are blocked or forwarded.
To log packets related to firewall rules, make sure that Access Control under Log
is selected in the Logs > Log Settings screen.
Click Apply to save the settings.
Click Reset to start configuring this screen again.
DESCRIPTION
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.
The NBG318S 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 both
incoming LAN and WAN Ping requests.
NBG318S User's Guide