Zyxel-communications NBG334SH Manual do Utilizador descarregar pdf (Página 124)

Chapter 11 Firewall

ZyXEL NBG-334SH User’s Guide

124

11.4 Services Screen

Click Security > Firewall > Services. The screen appears as shown next.

If an outside user attempts to probe an unsupported port on your ZyXEL Device, an ICMP

response packet is automatically returned. This allows the outside user to know the ZyXEL

Device exists. Use this screen to prevent the ICMP response packet from being sent. This

keeps outsiders from discovering your ZyXEL Device 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

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 46 Firewall General

LABEL DESCRIPTION

1 2 ... 119 120 121 122 123 124 125 126 127 128 129 ... 289 290

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