bin/delv/delv.rst

26 delv - DNS lookup and validation utility
32 :program:`delv` [@server] [ [**-4**] | [**-6**] ] [**-a** anchor-file] [**-b** address] [**-c** cla…
34 :program:`delv` [**-h**]
36 :program:`delv` [**-v**]
38 :program:`delv` [queryopt...] [query...]
43 ``delv`` is a tool for sending DNS queries and validating the results,
46 ``delv`` sends to a specified name server all queries needed to
55 for the root zone ("."). Records returned by ``delv`` are either fully
58 in detail. Because ``delv`` does not rely on an external server to carry
62 Unless it is told to query a specific name server, ``delv`` tries
64 addresses are found, ``delv`` sends queries to the localhost
67 When no command-line arguments or options are given, ``delv``
73 A typical invocation of ``delv`` looks like:
77     delv @server name type
85    hostname, ``delv`` resolves that name before querying that name
89    If no ``server`` argument is provided, ``delv`` consults
93    transport are tried. If no usable addresses are found, ``delv``
103    supplied, ``delv`` performs a lookup for an A record.
116    Note: When reading the trust anchor file, ``delv`` treats ``trust-anchors``,
119    supported. ``delv`` does not consult the managed-keys database maintained by
122    use DNSSEC validation in ``delv``.
132    "IN" is supported in ``delv`` and any other value is ignored.
137    ``delv`` become more verbose as the debug level increases. See the
142    This option displays the ``delv`` help usage output and exits.
148    not return invalid data; this can cause ``delv`` to time out. When it
179    This option prints the ``delv`` version and exits.
185    ``name`` or ``type`` arguments; ``delv`` automatically performs a
191    This option forces ``delv`` to only use IPv4.
194    This option forces ``delv`` to only use IPv6.
199 ``delv`` provides a number of query options which affect the way results
210    sent by ``delv``. This may be useful when troubleshooting DNSSEC
214    to return invalid responses, which ``delv`` can then validate
227    query sent by ``delv`` in the process of carrying out the resolution
239    responses received by ``delv`` in the process of carrying out the
297    parsing of the ``delv`` output.
300    This option indicates whether to display RRSIG records in the ``delv`` output.