1drill(1) General Commands Manual drill(1)
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6 drill - get (debug) information out of DNS(SEC)
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9 drill [ OPTIONS ] name [ @server ] [ type ] [ class ]
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13 drill is a tool to designed to get all sorts of information out of the
14 DNS. It is specificly designed to be used with DNSSEC.
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16 The name drill is a pun on dig. With drill you should be able get even
17 more information than with dig.
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19 If no arguments are given class defaults to 'IN' and type to 'A'. The
20 server(s) specified in /etc/resolv.conf are used to query against.
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23 name Ask for this name.
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26 @server Send to query to this server. If not specified use the name‐
27 servers from /etc/resolv.conf.
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30 type Ask for this RR type. If type is not given on the command line it
31 defaults to 'A'. Except when doing a reverse lookup when it defaults to
32 'PTR'.
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35 class Use this class when querying.
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39 drill mx miek.nl Show the MX records of the domain miek.nl
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42 drill -S jelte.nlnetlabs.nl
43 Chase any signatures in the jelte.nlnetlab.nl domain. This
44 option is only available when ldns has been compiled with
45 openssl-support.
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48 drill -TD www.example.com
49 Do a DNSSEC (-D) trace (-T) from the rootservers down to
50 www.example.com. This option only works when ldns has been com‐
51 piled with openssl support.
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54 drill -s dnskey jelte.nlnetlabs.nl
55 Show the DNSKEY record(s) for jelte.nlnetlabs.nl. For each found
56 DNSKEY record also print the DS record.
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60 -D Enable DNSSEC in the query. When querying for DNSSEC types
61 (DNSKEY, RRSIG, DS and NSEC) this is not automatically enabled.
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64 -T Trace name from the root down. When using this option the
65 @server arguments is not used.
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68 -S Chase the signature(s) of 'name' to a known key or as high up in
69 the tree as possible.
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72 -I IPv4 or IPv6 address
73 Source address to query from. The source address has to be
74 present on an interface of the host running drill.
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77 -V level
78 Be more verbose. Set level to 5 to see the actual query that is
79 sent.
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82 -Q Quiet mode, this overrules -V.
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85 -f file
86 Read the query from a file. The query must be dumped with -w.
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89 -i file
90 read the answer from the file instead from the network. This
91 aids in debugging and can be used to check if a query on disk is
92 valid. If the file contains binary data it is assumed to be a
93 query in network order.
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96 -w file
97 Write an answer packet to file.
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100 -q file
101 Write the query packet to file.
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104 -v Show drill's version.
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107 -h Show a short help message.
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110 QUERY OPTIONS
111 -4 Stay on ip4. Only send queries to ip4 enabled nameservers.
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114 -6 Stay on ip6. Only send queries to ip6 enabled nameservers.
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117 -a Use the resolver structure's fallback mechanism if the answer is
118 truncated (TC=1). If a truncated packet is received and this
119 option is set, drill will first send a new query with EDNS0 buf‐
120 fer size 4096.
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122 If the EDNS0 buffer size was already set to 512+ bytes, or the
123 above retry also results in a truncated answer, the resolver
124 structure will fall back to TCP.
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127 -b size
128 Use size as the buffer size in the EDNS0 pseudo RR.
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131 -c file
132 Use file instead of /etc/resolv.conf for nameserver configura‐
133 tion.
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136 -d domain
137 When tracing (-T), start from this domain instead of the root.
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140 -t Use TCP/IP when querying a server
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143 -k keyfile
144 Use this file to read a (trusted) key from. When this options is
145 given drill tries to validate the current answer with this key.
146 No chasing is done. When drill is doing a secure trace, this key
147 will be used as trust anchor. Can contain a DNSKEY or a DS
148 record.
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150 Alternatively, when DNSSEC enabled tracing (-TD) or signature
151 chasing (-S), if -k is not specified, and a default trust anchor
152 (/var/lib/unbound/root.key) exists and contains a valid DNSKEY
153 or DS record, it will be used as the trust anchor.
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156 -o mnemonic
157 Use this option to set or unset specific header bits. A bit is
158 set by using the bit mnemonic in CAPITAL letters. A bit is unset
159 when the mnemonic is given in lowercase. The following mnemonics
160 are understood by drill:
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162 QR, qr: set, unset QueRy (default: on)
163 AA, aa: set, unset Authoritative Answer (default: off)
164 TC, tc: set, unset TrunCated (default: off)
165 RD, rd: set, unset Recursion Desired (default: on)
166 CD, cd: set, unset Checking Disabled (default: off)
167 RA, ra: set, unset Recursion Available (default: off)
168 AD, ad: set, unset Authenticated Data (default: off)
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170 Thus: -o CD, will enable Checking Disabled, which instructs the
171 cache to not validate the answers it gives out.
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174 -p port
175 Use this port instead of the default of 53.
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178 -r file
179 When tracing (-T), use file as a root servers hint file.
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182 -s When encountering a DNSKEY print the equivalent DS also.
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185 -u Use UDP when querying a server. This is the default.
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188 -w file
189 write the answer to a file. The file will contain a hexadecimal
190 dump of the query. This can be used in conjunction with -f.
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193 -x Do a reverse lookup. The type argument is not used, it is preset
194 to PTR.
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197 -y <name:key[:algo]>
198 specify named base64 tsig key, and optional an algorithm
199 (defaults to hmac-md5.sig-alg.reg.int)
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202 -z don't randomize the nameserver list before sending queries.
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206 The exit status is 0 if the looked up answer is secure and trusted, or
207 insecure. The exit status is not 0 if the looked up answer is
208 untrusted or bogus, or an error occurred while performing the lookup.
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212 /var/lib/unbound/root.key
213 The file from which trusted keys are loaded when no -k option is
214 given.
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217 unbound-anchor(8)
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221 Jelte Jansen and Miek Gieben. Both of NLnet Labs.
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225 Report bugs to <ldns-team@nlnetlabs.nl>.
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230 Copyright (c) 2004-2008 NLnet Labs. Licensed under the revised BSD
231 license. There is NO warranty; not even for MERCHANTABILITY or FITNESS
232 FOR A PARTICULAR PURPOSE.
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236 dig(1), RFC403{3,4,5}.
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240 28 May 2006 drill(1)