Chapter 44 System
ZyWALL USG Series User’s Guide
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44.6.11 Adding a MX Record
Click the Add icon in the MX Record table to add a MX record.
Figure 642 Configuration > System > DNS > MX Record Add
The following table describes the labels in this screen.
44.6.12 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.
44.6.13 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.
Table 371 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.
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