Chapter 30 System
USG20(W)-VPN Series User’s Guide
547
IP Address This is the IP address of a host.
CNAME Record This record specifies an alias for a FQDN. Use this record to bind all subdomains with the
same IP address as the FQDN without having to update each one individually, which
increases chance for errors. See CNAME Record (Section 30.6.6 on page 549) for more
details.
Add Click this to create a new entry.
Edit Double-click an entry or select it and click Edit to be able to modify the entry’s settings.
Remove To remove an entry, select it and click Remove. The USG confirms you want to remove it
before doing so. Note that subsequent entries move up by one when you take this action.
# This is the index number of the domain zone forwarder record. The ordering of your rules
is important as rules are applied in sequence.
A hyphen (-) displays for the default domain zone forwarder record. The default record is
not configurable. The USG uses this default record if the domain zone that needs to be
resolved does not match any of the other domain zone forwarder records.
Alias Name Enter an Alias name. Use “*.” as prefix for a wildcard domain name. For example,
*.example.com.
FQDN Enter the Fully Qualified Domain Name (FQDN).
Domain Zone
Forwarder
This specifies a DNS server’s IP address. The USG can query the DNS server to resolve
domain zones for features like VPN, DDNS and the time server.
When the USG needs to resolve a domain zone, it checks it against the domain zone
forwarder entries in the order that they appear in this list.
Add Click this to create a new entry. Select an entry and click Add to create a new entry after
the selected entry.
Edit Double-click an entry or select it and click Edit to be able to modify the entry’s settings.
Remove To remove an entry, select it and click Remove. The USG confirms you want to remove it
before doing so. Note that subsequent entries move up by one when you take this action.
Move To change an entry’s position in the numbered list, select the method and click Move to
display a field to type a number for where you want to put it and press [ENTER] to move
the rule to the number that you typed.
# This is the index number of the domain zone forwarder record. The ordering of your rules
is important as rules are applied in sequence.
A hyphen (-) displays for the default domain zone forwarder record. The default record is
not configurable. The USG uses this default record if the domain zone that needs to be
resolved does not match any of the other domain zone forwarder records.
Domain Zone A domain zone is a fully qualified domain name without the host. For example,
zyxel.com.tw is the domain zone for the www.zyxel.com.tw fully qualified domain name.
A “*” means all domain zones.
Type This displays whether the DNS server IP address is assigned by the ISP dynamically
through a specified interface or configured manually (User-Defined).
DNS Server This is the IP address of a DNS server. This field displays N/A if you have the USG get a
DNS server IP address from the ISP dynamically but the specified interface is not active.
Query Via This is the interface through which the USG sends DNS queries to the entry’s DNS server.
If the USG connects through a VPN tunnel, tunnel displays.
MX Record (for My
FQDN)
A MX (Mail eXchange) record identifies a mail server that handles the mail for a
particular domain.
Add Click this to create a new entry.
Edit Double-click an entry or select it and click Edit to be able to modify the entry’s settings.
Table 234 Configuration > System > DNS (continued)
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