Chapter 24 System
USG FLEX H Series User’s Guide
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Figure 227 System > DNS & DDNS > DNS > Security Option Control
The following table describes the labels in this screen.
24.4.13 The DDNS Screen
The DDNS screen provides a summary of all DDNS domain names and their configuration. In addition,
this screen allows you to add new domain names, edit the configuration for existing domain names, and
delete domain names. Click System > DNS & DDNS > DDNS to open the following screen.
Table 184 System > DNS & DDNS > DNS > Security Option Control
LABEL DESCRIPTION
Query Recursion Choose if the Zyxel Device is allowed or denied to forward DNS client requests to DNS servers
for resolution. This can apply to specific open DNS servers using the address objects in a
customized rule.
Additional Info
from Cache
Choose if the Zyxel Device is allowed or denied to cache Resource Records (RR) obtained
from previous DNS queries.
Source Address This field displays address objects created in Object > Address. Select one or more address
object(s) to have it (them) to apply to this rule. For example, you could specify an open DNS
server suspect of sending compromised resource records by adding an address object for
that server to the member list.
Apply Click Apply to save your customized settings and exit this screen.
Reset Click Reset to return the screen to its last-saved settings.
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