drill(1)						      General Commands Manual							  drill(1)

NAME

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

SYNOPSIS

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

DESCRIPTION

       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.

SAMPLE USAGE

       drill mx miek.nl Show the MX records of the domain miek.nl

       drill -S jelte.nlnetlabs.nl
	      Chase any signatures in the jelte.nlnetlab.nl domain. This option is only available when ldns has been  compiled	with  openssl-sup-
	      port.

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

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

OPTIONS

       -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.

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

       -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.

   QUERY OPTIONS
       -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  struc-
	      ture 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 configuration.

       -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 record.

	      Alternatively, when DNSSEC enabled tracing (-TD) or signature chasing (-S), if -k is not	specified,  and  a  default  trust  anchor
	      (/var/lib/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 hmac-md5.sig-alg.reg.int)

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

FILES

       /var/lib/unbound/root.key
	      The file from which trusted keys are loaded when no -k option is given.

SEE ALSO

       unbound-anchor(8)

AUTHOR

       Jelte Jansen and Miek Gieben. Both of NLnet Labs.

REPORTING BUGS

       Report bugs to <ldns-team@nlnetlabs.nl>.

BUGS

COPYRIGHT

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

SEE ALSO

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

								    28 May 2006 							  drill(1)