ZyXEL NBG6616 User Guide - Page 131

Services Screen

Page 131 highlights

Chapter 17 Firewall Figure 87 Security > Firewall > General l The following table describes the labels in this screen. Table 56 Security > Firewall > General LABEL DESCRIPTION Enable Firewall Select this check box to activate the firewall. The NBG6616 performs access control and protects against Denial of Service (DoS) attacks when the firewall is activated. Apply Click Apply to save the settings. Cancel Click Cancel to start configuring this screen again. 17.3 Services Screen If an outside user attempts to probe an unsupported port on your NBG6616, an ICMP response packet is automatically returned. This allows the outside user to know the NBG6616 exists. Use this screen to prevent the ICMP response packet from being sent. This keeps outsiders from discovering your NBG6616 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. Click Security > Firewall > Services. The screen appears as shown next. NBG6616 User's Guide 131

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Chapter 17 Firewall
NBG6616 User’s Guide
131
Figure 87
Security > Firewall > General l
The following table describes the labels in this screen.
17.3
Services Screen
If an outside user attempts to probe an unsupported port on your NBG6616, an ICMP response
packet is automatically returned. This allows the outside user to know the NBG6616 exists. Use this
screen to prevent the ICMP response packet from being sent. This keeps outsiders from discovering
your NBG6616 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.
Click
Security
>
Firewall
>
Services
. The screen appears as shown next.
Table 56
Security > Firewall > General
LABEL
DESCRIPTION
Enable Firewall
Select this check box to activate the firewall. The NBG6616 performs access control and
protects against Denial of Service (DoS) attacks when the firewall is activated.
Apply
Click
Apply
to save the settings.
Cancel
Click
Cancel
to start configuring this screen again.