ZyXEL P-661H Series Bedienungsanleitung Seite 233

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Chapter 16 Remote Management Configuration
P-661H/HW Series User’s Guide
233
The following table describes the labels in this screen.
16.8 Configuring ICMP
To change your ZyXEL Device’s security settings, click Advanced > Remote MGMT >
ICMP. 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.
Figure 131 Remote Management: ICMP
The following table describes the labels in this screen.
Table 104 Remote Management: DNS
LABEL DESCRIPTION
Port You may change the server port number for a service if needed, however you must
use the same port number in order to use that service for remote management.
Access Status Select the interface(s) through which a computer may send DNS queries to the
ZyXEL Device.
Secured Client IP 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.
Cancel Click Cancel to begin configuring this screen afresh.
Table 105 Remote Management: ICMP
LABEL DESCRIPTION
ICMP Internet Control Message Protocol is a message control and error-reporting
protocol between a host server and a gateway to the Internet. ICMP uses Internet
Protocol (IP) datagrams, but the messages are processed by the TCP/IP software
and directly apparent to the application user.
Respond to Ping
on
The ZyXEL Device will not respond to any incoming Ping requests when Disable is
selected. Select LAN to reply to incoming LAN Ping requests. Select WAN to reply
to incoming WAN Ping requests. Otherwise, select LAN & WAN to reply to both
incoming LAN and WAN Ping requests.
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