ZyXEL Communications G-2000 Plus V2, Руководство пользователя

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ZyXEL G-2000 Plus v2 User’s Guide
176 Chapter 13 Remote Management Screens
Figure 73 Remote Management: DNS
The following table describes the labels in this screen.
13.7 Configuring Security
To change your ZyXEL device’s security settings, click REMOTE MGMT , then the
Security tab. The screen appears as shown.
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. Your ZyXEL device supports anti-probing, which prevents the ICMP response
packet from being sent. This keeps outsiders from discovering your ZyXEL device when
unsupported ports are probed.
Table 60 Remote Management: DNS
LABEL DESCRIPTION
Server Port The DNS service port number is 53 and cannot be changed here.
Server Access Select the interface(s) through which a computer may send DNS queries to the
ZyXEL device.
Secured Client IP
Address
A secured client is a “trusted” computer that is allowed to send DNS queries to the
ZyXEL device.
Select
All to allow any computer to send DNS queries to the ZyXEL device.
Choose Selected to just allow the computer with the IP address that you specify to
send DNS queries to the ZyXEL device.
Apply Click Apply to save your customized settings and exit this screen.
Reset Click Reset to begin configuring this screen afresh.