DNS/DHCP Management Console
Zones
A zone is a database that contains domain names and subdomain information for
a specified domain. To access zone property pages, select a zone from the DNS
service tab.
Attributes. Use this tab to specify a zone type as primary or secondary
and to assign servers that manage this zone.
Zone Out Filter. Use this tab to add or delete IP addresses and networks
that are authorized to do zone transfers for this zone.
SOA (Start of Authority) Information. Use this tab to make modifications
to a zone's SOA record. It has the following fields:
- Zone Master. Specifies the domain name of the master DNS server for
this zone.
- E-mail Address. Specifies the e-mail address of the responsible person
for this zone. When configuring this field replace the @ symbol of the email
address with '.' that is, john@somecomapny.com must be entered as john.somecomapny.com.
When a zone is created, the value root.<zonename> is assigned to this
field.
- Serial Number. Specifies the version number of the original copy
of the zone. When a zone is created, a serial number based on the current
date is configured by the utility. This can later be changed to suit your
own convention.
- Interval Values. Use this field to set server parameters, such as
Refresh etc. Refresh enables the user to specify (in minutes) the time in
which the secondary name server downloads a copy of the zone data from the
primary name server.
- Retry. Specifies the time (in minutes) that a secondary name server
waits after an attempt failed to transfer before it tries to transfer the
zone database again.
- Expire. Specifies the time (in hours) that a secondary name server
continues to try to transfer a zone database.
- Minimal TTL. Specifies the minimum TTL (in hours) for a resource
record. This parameter determines how long a DNS server retains an address
mapping in cache.
Control Lists. Use this tab to specify the access control information
of this zone.
Click Add to add a value to this list. To delete an item, select the item to
be deleted and click Delete.
- Query Filter. Specifies a list of IP addresses or network addresses
that are authorized to query the DNS server for the resource records present
in this zone. If this option is not configured, each of the DNS servers servicing
this zone will use its own query filter list value (if configured), otherwise
the default value any is used.
- Also Notify. Specifies a list of IP addresses of name servers that
are to be notified, whenever changes occur to the zone database and a fresh
copy of the zone is loaded, in addition to the servers present in this zone's
NS records. If this option is not configured, each of the DNS servers servicing
this zone will use its own also-notify list value (if configured).
- Allow Update. Specifies a list of IP addresses or network addresses
that are authorized to send updates for this zone. This option can be configured
only for a primary zone. If this option is not configured, the default value
none is used, where no host is authorized to send updates.
Advanced. Use this tab to specify additional
zone options.
Create Zone
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