ZyXEL NBG-318S Guía Del Usuario
Chapter 12 Firewall
NBG-318S User’s Guide
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12.4 Services Screen
Click Security > Firewall > Services. The screen appears as shown next.
If an outside user attempts to probe an unsupported port on your NBG-318S, an ICMP
response packet is automatically returned. This allows the outside user to know the NBG-318S
exists. Use this screen to prevent the ICMP response packet from being sent. This keeps
outsiders from discovering your NBG-318S 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.
If an outside user attempts to probe an unsupported port on your NBG-318S, an ICMP
response packet is automatically returned. This allows the outside user to know the NBG-318S
exists. Use this screen to prevent the ICMP response packet from being sent. This keeps
outsiders from discovering your NBG-318S 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.
Log
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
To log packets related to firewall rules, make sure that Access Control under Log
is selected in the Logs > Log Settings screen.
Apply
Click Apply to save the settings.
Reset
Click Reset to start configuring this screen again.
Table 49 Security > Firewall > General
LABEL
DESCRIPTION