Chapter 46 System
UAG Series User’s Guide
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46.6.3 Address Record
An address record contains the mapping of a Fully-Qualified Domain Name (FQDN) to an IP
address. An FQDN consists of a host and domain name. For example, www.zyxel.com is a fully
qualified domain name, where “www” is the host, “zyxel” is the second-level domain, and “com” is
the top level domain. mail.myZyXEL.com.tw is also a FQDN, where “mail” is the host, “myZyXEL” is
the third-level domain, “com” is the second-level domain, and “tw” is the top level domain.
The UAG allows you to configure address records about the UAG 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 UAG receives a DNS query for an FQDN for which the UAG has an address record,
the UAG can send the IP address in a DNS response without having to query a DNS name server.
46.6.4 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.
46.6.5 Adding an Address/PTR Record
Click the
Add
icon in the
Address/PTR Record
table to add an address/PTR record.
Domain Name
This is the domain name where the mail is destined for.
IP/FQDN
This is 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.
Service Control
This specifies from which computers and zones you can send DNS queries to the UAG.
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 UAG 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 the index number of the service control rule. The ordering of your rules is important
as rules are applied in sequence.
The entry with a hyphen (-) instead of a number is the UAG’s (non-configurable) default
policy. The UAG applies this to traffic that does not match any other configured rule. It is
not an editable rule. To apply other behavior, configure a rule that traffic will match so the
UAG will not have to use the default policy.
Zone
This is the zone on the UAG the user is allowed or denied to access.
Address
This is the object name of the IP address(es) with which the computer is allowed or
denied to send DNS queries.
Action
This displays whether the UAG accepts DNS queries from the computer with the IP
address specified above through the specified zone (
Accept
) or discards them (
Deny
).
Table 235
Configuration > System > DNS (continued)
LABEL
DESCRIPTION
