UCS 2.4 - Univention

4 Univention Directory Manager
end in a full stop to avoid the domain name being added anew.
4.5.9.1 Forward lookup zone
A forward lookup zone contains information which is used to resolve DNS names into IP addresses.
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’General’ tab
Zone name (*)
This is the complete name of the DNS domain for which the zone will be responsible.
Attention:
The domain name must not end in a full stop in zone names!
Zone Time-to-Live (*)
The time to live specifies how long these files may be cached by other DNS servers. The preset value
is three hours.
’Start of Authority’ tab
Each DNS zone has at least one authoritative, primary name server whose information governs the
zone. Subordinate servers synchronise themselves with the authoritative server via zone transfers.
The entry which defines such a zone is called a "SOA record" in DNS terminology.
Contact person (*)
The e-mail address of the person responsible for administrating the zone (with a full stop at the end).
Name server (*)
The fully qualified domain name with a full stop at the end or the relative domain name of the primary
master name server.
Attention:
Only the primary master name server should be entered in this field. Further name servers can be
entered on the Name servers tab.
Serial number (*)
Other DNS servers use the serial number to recognise whether zone data have changed. The slave
name server compares the serial number of its copy with that on the master name server. If the serial
number of the slave is lower than that on the master, the slave copies the changed data.
There are two commonly used patterns for this serial number:
• Start with 1 and increment the serial number with each change