unbound-host(1)

1unbound-host(1)                 unbound 1.4.13                 unbound-host(1)
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NAME

6       unbound-host - unbound DNS lookup utility
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SYNOPSIS

9       unbound-host  [-vdhr46] [-c class] [-t type] hostname [-y key] [-f key‐
10       file] [-F namedkeyfile] [-C configfile]
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DESCRIPTION

13       Unbound-host uses the unbound validating  resolver  to  query  for  the
14       hostname and display results. With the -v option it displays validation
15       status: secure, insecure, bogus (security failure).
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17       By default it reads no configuration file whatsoever.  It  attempts  to
18       reach  the  internet  root servers.  With -C an unbound config file and
19       with -r resolv.conf can be read.
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21       The available options are:
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23       hostname
24              This name is resolved (looked up in the DNS).  If a IPv4 or IPv6
25              address is given, a reverse lookup is performed.
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27       -h     Show the version and commandline option help.
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29       -v     Enable  verbose output and it shows validation results, on every
30              line.  Secure means that the NXDOMAIN  (no  such  domain  name),
31              nodata  (no  such data) or positive data response validated cor‐
32              rectly with one of the keys.  Insecure means  that  that  domain
33              name  has  no  security set up for it.  Bogus (security failure)
34              means that the response failed one or more checks, it is  likely
35              wrong, outdated, tampered with, or broken.
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37       -d     Enable  debug  output  to stderr. One -d shows what the resolver
38              and validator are doing and may tell you what is going on.  More
39              times,  -d -d, gives a lot of output, with every packet sent and
40              received.
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42       -c class
43              Specify the class to lookup for, the default is IN the  internet
44              class.
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46       -t type
47              Specify  the type of data to lookup. The default looks for IPv4,
48              IPv6 and mail handler data, or domain name pointers for  reverse
49              queries.
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51       -y key Specify  a  public  key to use as trust anchor. This is the base
52              for a chain of trust that is built up from the trust  anchor  to
53              the  response, in order to validate the response message. Can be
54              given as a DS or DNSKEY record.  For example -y "example.com  DS
55              31560 5 1 1CFED84787E6E19CCF9372C1187325972FE546CD".
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57       -f keyfile
58              Reads keys from a file. Every line has a DS or DNSKEY record, in
59              the format as for -y. The zone file format, the same as dig  and
60              drill produce.
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62       -F namedkeyfile
63              Reads   keys   from  a  BIND-style  named.conf  file.  Only  the
64              trusted-key {}; entries are read.
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66       -C configfile
67              Uses the specified unbound.conf to prime libunbound(3).
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69       -r     Read /etc/resolv.conf, and use  the  forward  DNS  servers  from
70              there  (those  could  have  been  set  by  DHCP).   More info in
71              resolv.conf(5).  Breaks validation if those servers do not  sup‐
72              port DNSSEC.
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74       -4     Use solely the IPv4 network for sending packets.
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76       -6     Use solely the IPv6 network for sending packets.
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EXAMPLES

79       Some  examples  of use. The keys shown below are fakes, thus a security
80       failure is encountered.
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82       $ unbound-host www.example.com
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84       $    unbound-host    -v    -y    "example.com    DS    31560    5     1
85       1CFED84787E6E19CCF9372C1187325972FE546CD" www.example.com
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87       $     unbound-host    -v    -y    "example.com    DS    31560    5    1
88       1CFED84787E6E19CCF9372C1187325972FE546CD" 192.0.2.153
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EXIT CODE

91       The unbound-host program exits with status code 1 on  error,  0  on  no
92       error.  The data may not be available on exit code 0, exit code 1 means
93       the lookup encountered a fatal error.
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NAME

SYNOPSIS

DESCRIPTION

EXAMPLES

EXIT CODE

SEE ALSO