ZyXEL Communications Corporation NBG419N Manuel D’Utilisation
Chapter 19 Firewall
NBG-419N Users Guide
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19.4 General Firewall Screen
Use this screen to enable or disable the NBG-419Ns firewall, and set up firewall
logs. Click Security > Firewall to open the General screen.
logs. Click Security > Firewall to open the General screen.
Figure 102 Security > Firewall > General
The following table describes the labels in this screen.
19.5 Services Screen
If an outside user attempts to probe an unsupported port on your NBG-419N, an
ICMP response packet is automatically returned. This allows the outside user to
know the NBG-419N exists. Use this screen to prevent the ICMP response packet
from being sent. This keeps outsiders from discovering your NBG-419N when
unsupported ports are probed.
ICMP response packet is automatically returned. This allows the outside user to
know the NBG-419N exists. Use this screen to prevent the ICMP response packet
from being sent. This keeps outsiders from discovering your NBG-419N 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.
services you want to block and the date/time you want to block them.
Table 63 Security > Firewall > General
LABEL
DESCRIPTION
Enable Firewall
Select this check box to activate the firewall. The NBG-419N performs
access control and protects against Denial of Service (DoS) attacks
when the firewall is activated.
access control and protects against Denial of Service (DoS) attacks
when the firewall is activated.
Apply
Click Apply to save the settings.
Reset
Click Reset to start configuring this screen again.
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