Command Section
drill(1)                FreeBSD General Commands Manual               drill(1)

       drill - get (debug) information out of DNS(SEC)

       drill [ OPTIONS ] name [ @server ] [ type ] [ class ]

       drill is a tool to designed to get all sorts of information out of the
       DNS. It is specificly designed to be used with DNSSEC.

       The name drill is a pun on dig. With drill you should be able get even
       more information than with dig.

       If no arguments are given class defaults to 'IN' and type to 'A'. The
       server(s) specified in /etc/resolv.conf are used to query against.

       name Ask for this name.

       @server Send to query to this server. If not specified use the
       nameservers from /etc/resolv.conf.

       type Ask for this RR type. If type is not given on the command line it
       defaults to 'A'. Except when doing to reverse lookup when it defaults
       to 'PTR'.

       class Use this class when querying.

       drill mx Show the MX records of the domain

       drill -S
              Chase any signatures in the domain. This
              option is only available when ldns has been compiled with

       drill -TD
              Do a DNSSEC (-D) trace (-T) from the rootservers down to
      This option only works when ldns has been
              compiled with openssl support.

       drill -s dnskey
              Show the DNSKEY record(s) for For each found
              DNSKEY record also print the DS record.

       -D     Enable DNSSEC in the query. When querying for DNSSEC types
              (DNSKEY, RRSIG, DS and NSEC) this is not automaticly enabled.

       -T     Trace name from the root down. When using this option the
              @server and the type arguments are not used.

       -S     Chase the signature(s) of 'name' to a known key or as high up in
              the tree as possible.

       -I  IPv4 or IPv6 address
              Source address to query from.  The source address has to be
              present on an interface of the host running drill.

       -V level
              Be more verbose. Set level to 5 to see the actual query that is

       -Q     Quiet mode, this overrules -V.

       -f file
              Read the query from a file. The query must be dumped with -w.

       -i file
              read the answer from the file instead from the network. This
              aids in debugging and can be used to check if a query on disk is
              valid.  If the file contains binary data it is assumed to be a
              query in network order.

       -w file
              Write an answer packet to file.

       -q file
              Write the query packet to file.

       -v     Show drill's version.

       -h     Show a short help message.

       -4     Stay on ip4. Only send queries to ip4 enabled nameservers.

       -6     Stay on ip6. Only send queries to ip6 enabled nameservers.

       -a     Use the resolver structure's fallback mechanism if the answer is
              truncated (TC=1). If a truncated packet is received and this
              option is set, drill will first send a new query with EDNS0
              buffer size 4096.

              If the EDNS0 buffer size was already set to 512+ bytes, or the
              above retry also results in a truncated answer, the resolver
              structure will fall back to TCP.

       -b size
              Use size as the buffer size in the EDNS0 pseudo RR.

       -c file
              Use file instead of /etc/resolv.conf for nameserver

       -d domain
              When tracing (-T), start from this domain instead of the root.

       -t     Use TCP/IP when querying a server

       -k keyfile
              Use this file to read a (trusted) key from. When this options is
              given drill tries to validate the current answer with this key.
              No chasing is done. When drill is doing a secure trace, this key
              will be used as trust anchor. Can contain a DNSKEY or a DS

              Alternatively, when DNSSEC enabled tracing (-TD) or signature
              chasing (-S), if -k is not specified, and a default trust anchor
              (/etc/unbound/root.key) exists and contains a valid DNSKEY or DS
              record, it will be used as the trust anchor.

       -o mnemonic
              Use this option to set or unset specific header bits. A bit is
              set by using the bit mnemonic in CAPITAL letters. A bit is unset
              when the mnemonic is given in lowercase. The following mnemonics
              are understood by drill:

                      QR, qr: set, unset QueRy (default: on)
                      AA, aa: set, unset Authoritative Answer (default: off)
                      TC, tc: set, unset TrunCated (default: off)
                      RD, rd: set, unset Recursion Desired (default: on)
                      CD, cd: set, unset Checking Disabled  (default: off)
                      RA, ra: set, unset Recursion Available  (default: off)
                      AD, ad: set, unset Authenticated Data (default: off)

              Thus: -o CD, will enable Checking Disabled, which instructs the
              cache to not validate the answers it gives out.

       -p port
              Use this port instead of the default of 53.

       -r file
              When tracing (-T), use file as a root servers hint file.

       -s     When encountering a DNSKEY print the equivalent DS also.

       -u     Use UDP when querying a server. This is the default.

       -w file
              write the answer to a file. The file will contain a hexadecimal
              dump of the query. This can be used in conjunction with -f.

       -x     Do a reverse loopup. The type argument is not used, it is preset
              to PTR.

       -y <name:key[:algo]>
              specify named base64 tsig key, and optional an algorithm
              (defaults to

       -z     don't randomize the nameserver list before sending queries.

       The exit status is 0 if the looked up answer is secure and trusted, or
       insecure.  The exit status is not 0 if the looked up answer is
       untrusted or bogus, or an error occurred while performing the lookup.

              The file from which trusted keys are loaded when no -k option is


       Jelte Jansen and Miek Gieben. Both of NLnet Labs.

       Report bugs to <[email protected]>.

       Copyright (c) 2004-2008 NLnet Labs.  Licensed under the revised BSD
       license. There is NO warranty; not even for MERCHANTABILITY or FITNESS

       dig(1), RFC403{3,4,5}.

                                  28 May 2006                         drill(1)
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