ZyXEL Communications G.SHDSL.bis 4-port Security Gateway P-793H - Manual (Page 211)

P-793H User’s Guide
Chapter 15 Remote Management Configuration 211
The following table describes the labels in this screen.
15.8 Configuring ICMP
Use this screen to control how the ZyXEL Device responds to other types of requests. 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 102 Remote MGMT > ICMP
Table 76 Remote MGMT > 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.