The Start of Authority (SOA)
Overview page displays the Start of Authority information for the zone.
The Start of Authority (SOA)
Overview page displays the following information:
serial
number. The serial number
of the SOA
record. This is generated automatically.
responsible
person. The email of the DNS server administrator. The email address
is in Standard DNS Fully Qualified Domain Name (FQDN)
format. For example, the email address 'admin@wvh.com'
is represented in FQDN format as admin.wvh.com. In the FQDN format, a
period (.) replaces the @ sign.
refresh
interval. This value determines
how often the secondary DNS server checks to see if its data is current.
The server will make one SOA
query per zone per refresh interval.
retry
interval. This value determines how often the secondary DNS server
reconnects to the primary server. Normally, the retry interval is shorter
than the refresh interval, but it does not have to be so.
expiry
interval. The period of time for which zone information is valid
on the secondary server. If the secondary server cannot download data
from a primary server within this period, the secondary server stops responding
to DNS queries.
minimum
time to live. This value specifies the time other servers can cache
data and applies to all the resource records in the database file.