ZyXEL Communications P-660HWP-D1, User Manual

Page: 239 / 374

Chapter 17 Remote Management Configuration
P-660HWP-D1 User’s Guide
239
Figure 136 Remote Management: DNS
The following table describes the labels in this screen.
17.8 Configuring ICMP
To change your P-660HWP-D1’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 P-660HWP-D1, an ICMP
response packet is automatically returned. This allows the outside user to know the P-
660HWP-D1 exists. Your P-660HWP-D1 supports anti-probing, which prevents the ICMP
response packet from being sent. This keeps outsiders from discovering your P-660HWP-D1
when unsupported ports are probed.
Table 103 Remote Management: DNS
LABEL DESCRIPTION
Port The DNS service port number is 53.
Access Status Select the interface(s) through which a computer may send DNS queries to the P-
660HWP-D1.
Secured Client IP A secured client is a “trusted” computer that is allowed to send DNS queries to the
P-660HWP-D1.
Select
All to allow any computer to send DNS queries to the P-660HWP-D1.
Choose Selected to just allow the computer with the IP address that you specify to
send DNS queries to the P-660HWP-D1.
Apply Click Apply to save your customized settings and exit this screen.
Cancel Click Cancel to begin configuring this screen afresh.