CSV1(5) MaraDNS reference CSV1(5)NAMEcsv1 - Format of the csv1 zone file that MaraDNS uses
SPECIAL NOTE
The csv1 zone file format is supported primarily for MaraDNS users who
already have zone files in the csv1 format. MaraDNS now supports a csv2
zone file format. Note that the csv1 zone file format will continue to
function as long as I am MaraDNS' maintainer.
SPECIAL CHARACTERS
| This delimits fields
# This signifies a comment. Lines starting with this are ignored,
otherwise it has no significance
% This, in domain names, signifies that the rest of the domain name
should be the name of this zone
* This is translated to mean "any host name that otherwise does not
resolve". It must be at the beginning of a domain name.
\ This is used as an escape character, either to escape octal values
such as '\045' for %, or to escape the '%' character so it has no
special meaning, or to escape the backslash character.
NOTES ON PROCESSING
All domain-name labels are converted to their lower-case equivalents
before processing is done. This is because domain-name literals in the
database with one or more upper-case letters in them are case-
sensitive. This is my way to resolve RFC1035 schizophrenic desire to
both allow binary domain labels, and its desire to be case-insensitive.
The file must first have a SOA record, followed by one or more NS
records, followed by other records. The initial NS and SOA records must
be RR for this zone. NS records after any non-NS record must be part of
another zone. The resolution algorithm will not break if non-CNAME
records share records with a CNAME record, but this is not a good idea
to do.
RR FORMAT
A domain name is a one-letter designation of its type, followed by the
domain name separated by dots, ending with either a % or a trailing
dot. If the domain name does not end with a % or trailing dot, an
error is returned.
SUPPORTED RR TYPES
MaraDNS only supports the following types of resource records (RRs) in
csv1 files. More resource records types are supported in csv2 zone
files; see csv2(5) for details.
Letter Type RFC1035 section 3.2.2 value
A A 1
N NS 2
C CNAME 5
S SOA 6
P PTR 12
@ MX 15
T TXT 16
U any determined in third field of line
FORMAT OF SUPPORTED RR TYPES
Here are the formats, shown by letter name:
A: Has three fields
field one: the domain name
field two: the ttl for the name in seconds
field three: the ip address, in dotted decimal notation
Example:
Ahost.example.com.|7200|10.1.2.3
A records are described with grueling detail in RFC1035. In short, an A
record is an IP address for a given host name.
N: Has three fields
field one: the domain name of the record
field two: the ttl for the name in seconds
field three: the domain name this NS points to.
Example:
Nexample.com.|86400|ns.example.com.
NS (N here) records are described in RFC1035
C: Has three fields
field one: the domain name of the record
field two: the ttl for the name in seconds
field three: the domain this CNAME record points to
Example:
Calias.example.org.|3200|realname.example.org.
CNAME (which C is short for) records are described in RFC1035
S: Has nine fields
field one: the domain name of the record
field two: the TTL of the record
field three: the origin of the domain. In other words, the name of the
primary name server for the domain.
field four: the email address for this domain (in the RFC822, not
BIND format)
field five: the serial for the domain
field six: the refresh (how often to see updates) for the domain
field seven: the retry (how often to try when down) for the domain
field eight: the expire (how long before the slave gives up) for the
domain
field nine: the minimum (and default) TTL for the domain
Example:
Sexample.net.|86400|%|hostmaster@%|19771108|7200|3600|604800|1800
SOA (S here) records are described in RFC1035
P: has three fields
field one: the IP we wish to point to (in in-addr.arpa form)
field two: the ttl for the name in seconds
field three: the FQDN for the IP in question
Example:
P3.2.1.10.in-addr.arpa.|86400|ns.example.com.
PTR (P here) records, which are used for reverse DNS lookups, are
described in RFC1035. Note that one needs control of the appropriate
in-addr.arpa subdomain to make PTR records visible on the internet at
large.
@: has four fields
field one: The host that people send email to
field two: the ttl for this record
field three: The preference for this MX host
field four: The name of this MX host
Example:
@example.com.|86400|10|mail.example.com.
MX (@ here) records are described in RFC1035
T: has three fields
field one: The host someone wants to get additional information about
field two: the ttl for this record
field three: The desired text. Any data becomes the record up until a
new line is reached. The new line is not part of the TXT
record
Example:
Texample.com.|86400|Example.com: Buy example products online
TXT (T here) records are described in RFC1035
U: has four fields
field one: The host someone wants a data type normally unsupported by
MaraDNS for
field two: the ttl for this record
field three: The numeric code for this data type (33 for SRV, etc.)
field four: The raw binary data for this data type
Example:
Uexample.com.|3600|40|\010\001\002Kitchen sink data
The above example is a "Kitchen Sink" RR (see draft-ietf-dnsind-
kitchen-sink-02.txt) with a "meaning" of 8, a "coding" of 1, a
"subcoding" of 2, and a data string of "Kitchen sink data". Since this
particular data type is not formalized in a RFC at this time, the most
appropriate method of storing this data is by using the catch-all
"unsupported" syntax.
EXAMPLE CSV1 ZONE FILE
# Example CSV1 zone file
# This is what is known as a SOA record. All zone files need to have one
# of these
S%|86400|%|hostmaster@%|19771108|7200|3600|604800|1800
# These are known as authoritative NS records. All zone files need
# one or more of these
N%|86400|ns1.%
N%|86400|ns2.%
# Some IP addresses
Ans1.%|86400|10.0.0.1
Ans2.%|86400|192.168.0.1
A%|86400|10.1.2.3
Amx.%|86400|10.1.2.4
# An 'IN MX' record
@%|86400|10|mx.%
LEGAL DISCLAIMER
THIS SOFTWARE IS PROVIDED BY THE AUTHORS ''AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
AUTHOR
Sam Trenholme http://www.samiam.org/
MARADNS January 2002 CSV1(5)
