Chapter 37 System
ZyWALL ATP Series User’s Guide
704
The following table describes the labels in this screen.
37.6.12 Security Option Control
Configure the
Security Option Control
section in the
Configuration > System > DNS
screen (click
Show
Advanced Settings
to display it) if you suspect the Zyxel Device is being used by hackers in a DNS
amplification attack.
One possible strategy would be to deny
Query Recursion
and
Additional Info from Cache
in the default
policy and allow
Query Recursion
and
Additional Info from Cache
only from trusted DNS servers
identified by address objects and added as members in the customized policy.
37.6.13 Editing a Security Option Control
Click a control policy and then click
Edit
to change
allow
or
deny
actions for
Query Recursion
and
Additional Info from Cache
.
Figure 465
Configuration > System > DNS > Security Option Control Edit (Customize)
Table 308 Configuration > System > DNS > MX Record Add
LABEL
DESCRIPTION
Domain Name
Enter the domain name where the mail is destined for.
IP Address/FQDN
Enter the IP address or Fully-Qualified Domain Name (FQDN) of a mail server that handles the
mail for the domain specified in the field above.
OK
Click
OK
to save your customized settings and exit this screen.
Cancel
Click
Cancel
to exit this screen without saving