askmara - do simple dns queries
queries the user-specified dns server for records, and outputs
the reply in a csv2-compatible format (csv2 is the format of zone files that
[-n] [ -v | -t timeout] query [ server ]
- If this is present, the following argument is the askmara timeout, in
seconds. Note that askmara can not both have a user-defined timeout
and verbose output.
- If this is set, askmara will verbosely output the complete reply
that the server sent. Note that this verbose output is not
- If this is set, askmara, when sending out a query, will not request
DNS recursion; in other words, askmara will request that the remote DNS
server not contact other DNS servers to answer the query in question.
- dns record to be queried. The query has two sections: The type of record
we desire, and the hostname we want this record for.
The type of query can have two forms: A one-letter mnemonic, or a numeric rtype
followed by a colon. This is immediately concatenated by the full name of the
host name we wish to look up.
For example, to ask for the IP of 'example.com.', we can use the one-letter
mnemonic, in the form 'Aexample.com.', or we can use the numeric RR followed
by a colon, giving the query '1:example.com.' (since A has the record type of
one). Note that the query name needs the trailing dot at the end.
Askmara supports a handful one-letter mnemonics, as follows:
signifies a request for an A (ipv4 address) RR
signifies a NS RR
signifies that we are asking for a CNAME RR
signifies that we want a SOA RR
signifies that we want a PTR RR
signifies that we mant a MX RR
signifies that we want a TXT RR
signifies that we want to ask for all RRs.
- IP address of the dns server to be queried. If no server is given, askmara
will query 127.0.0.1.
Asking the server with the ip 127.0.0.1 for the IP address of example.com:
Asking the server with the ip 126.96.36.199 for the IP address of example.com:
askmara Aexample.com. 188.8.131.52
Asking the server with the ip address 127.0.0.1 for the IP address of
example.com, using the rr_number:query format:
Asking the server with the ip address 127.0.0.1 for a SRV record. In particular,
we ask for the "http over tcp" service for example.net. Since
askmara doesn't have a mnemonic for SRV record types, we use the numeric code
(33 for SRV):
Asking the server with the ip address 127.0.0.1 for the AAAA (ipv6 ip) record
Note that the output will be a raw DNS packet in both the SRV and AAAA examples.
When askmara is asked for an SOA record, the output of askmara
resembles the format of a csv2 file, but can not be parsed as a csv2 file
askmara outputs multi-chunk ("character-string") TXT records
incorrectly (it only outputs the first chunk).
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MaraDNS is written by Sam Trenholme. Jaakko Niemi used 5 minutes to roll this
manpage together, which Sam has subsequently revised.