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14.4.2.1 domain 329
DNS entries can be specified absolute or relative. An entry
which ends with a dot is considered to be absolute (e.g.
"www.example.com."). A relative entry has no trailing dot. The
current zone will be appended automatically to this entry.
If for instance the current zone is "example.com", you only
need to enter "www" to define "www.example.com.". Entering
"www.example.com" (without trailing dot) is not what you
actually want, as it defines "www.example.com.example.com.".
The values you have to specify for a new entry depend upon the selected type.
A
Maps a name to an IP address. Specify the relative or absolute name in the first
input field and the IP address in the second. If a name resolves to more than
one IP address, the client will select a random one. On failure it will try the next
address.
AAAA
Equivalent of "A", but for IPv6 addresses.
CNAME
Defines an alias for a name. Enter the alias in the first field and an existing name
in the second. Both fields may contain either relative or absolute names.
MX
Specifies the mail server for a domain. Enter the mail domain (the part behind the
@ of an email address) in the first field. In the second field you have to specify the
hostname of a mail server. You can use absolute or relative names in both input
fields. The number specifies the priority. The MX entry with the lowest priority will
be tried first. If the corresponding mail server is not available, the mail servers
with higher priority will be used. If there are multiple MX entries with the same
priority for the same domain, the client will choose a random entry. On failure it
will try the next address.
NS
Defines a name server for a domain. Specify the domain in the first and the name
of the DNS in the second field. Both values may be either an absolute or a relative
name. If multiple entries are defined for the same domain, the client will make a
random selection. If the corresponding DNS is not available, it will try the next
address.
SRV
Specify the server for a specific service. The entry must begin with
"_servicename._protocol" (e.g. "_sip._udp"). The corresponding value starts with
the UDP or TCP port number followed by a space character and the actual server
name (e.g. "5060 www.example.com.).
TXT
Allows you to enter an arbitrary text.