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Chapter 30 System
USG20(W)-VPN Series User’s Guide
549
The USG allows you to configure address records about the USG itself or another device. This way
you can keep a record of DNS names and addresses that people on your network may use
frequently. If the USG receives a DNS query for an FQDN for which the USG has an address record,
the USG can send the IP address in a DNS response without having to query a DNS name server.
30.6.4 PTR Record
A PTR (pointer) record is also called a reverse record or a reverse lookup record. It is a mapping of
an IP address to a domain name.
30.6.5 Adding an Address/PTR Record
Click the
Add
icon in the
Address/PTR Record
table to add an address/PTR record.
Figure 373
Configuration > System > DNS > Address/PTR Record Edit
The following table describes the labels in this screen.
30.6.6 CNAME Record
A Canonical Name Record or CNAME record is a type of resource record in the Domain Name
System (DNS) that specifies that the domain name is an alias of another, canonical domain name.
This allows users to set up a record for a domain name which translates to an IP address, in other
words, the domain name is an alias of another. This record also binds all the subdomains to the
same IP address without having to create a record for each, so when the IP address is changed, all
subdomain’s IP address is updated as well, with one edit to the record.
Table 235
Configuration > System > DNS > Address/PTR Record Edit
LABEL
DESCRIPTION
FQDN
Type a Fully-Qualified Domain Name (FQDN) of a server. An FQDN starts with a host
name and continues all the way up to the top-level domain name. For example,
www.zyxel.com.tw is a fully qualified domain name, where “www” is the host, “zyxel” is
the third-level domain, “com” is the second-level domain, and “tw” is the top level
domain. Underscores are not allowed.
Use "*." as a prefix in the FQDN for a wildcard domain name (for example,
*.example.com).
IP Address
Enter the IP address of the host in dotted decimal notation.
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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