.TH "kdig" "1" "2017-07-14" "CZ.NIC Labs" "Knot DNS, version 1.6.0"
.SH NAME
.TP 5
.B kdig
\- Advanced DNS lookup utility (libknot equivalent of ISC dig)
.SH SYNOPSIS
.B kdig
[\fIcommon\-settings\fR] [\fIquery\fR [\fIsettings\fR]]...
.TP 5
.B kdig \-h
.SH DESCRIPTION
This utility sends one or more DNS \fIqueries\fR to a nameserver. Each query can
have individual \fIsettings\fR, or it can be specified globally via \fIcommon\-settings\fR,
which must precede \fIquery\fR specification.
.TP 4
.I query
\fIname\fR | \fB\-q\fR \fIname\fR | \fB\-x\fR \fIaddress\fR | \fB\-G\fR \fItapfile\fR
.TP
.I common\-settings, settings
[\fIclass\fR] [\fItype\fR] [\fB@\fIserver\fR]... [\fIoptions\fR]
.TP
.I name
Is a domain name that is to be looked up.
.TP
.I server
Is a domain name or an IPv4 or IPv6 address of the nameserver to send a query to.
An additional port can be specified using address:port ([address]:port for IPv6 address)
or address@port or address#port notation. If no server is specified, the servers from
\fB/etc/resolv.conf\fR are used.
.TP
If no arguments are provided, \fBkdig\fR sends \fINS\fR query for the root zone.
.SH OPTIONS
.TP 4
.B \-4
Use IPv4 protocol only.
.TP
.B \-6
Use IPv6 protocol only.
.TP
.BI \-b \ address
Set the source IP address of the query to \fIaddress\fR. The address
must be a valid address for local interface or :: or 0.0.0.0.
Optional port can be specified in the same format as \fIserver\fR value.
.TP
.BI \-c \ class
Set query class (e.g. \fICH\fR, \fICLASS4\fR). An explicit variant of
\fIclass\fR specification. The default class is \fIIN\fR.
.TP
.B \-d
Enable debug messages if any.
.TP
.BR \-h ,\  \-\-help
Print short help.
.TP
.BI \-k \ keyfile
Use TSIG or SIG\-0 key stored in a file \fIkeyfile\fR to authenticate the request.
Supported file format is the same as generated by ISC \fBdnssec\-keygen\fR.
The key comprises of public (.key extension) and private part (.private extension).
Either of these file names or a name without the extension can be specified as \fIkeyfile\fR
parameter.
.TP
.BI \-p \ port
Set nameserver port number or service name to send a query to.
The default port is \fI53\fR.
.TP
.BI \-q \ name
Set query name. An explicit variant of \fIname\fR specification.
.TP
.BI \-t \ type
Set query type (e.g. \fINS\fR, \fIIXFR=12345\fR, \fITYPE65535\fR).
An explicit variant of \fItype\fR specification. The default type is \fIA\fR.
It is also possible to use \fINOTIFY\fR parameter to send a notify message.
.TP
.BR \-v ,\  \-\-version
Print program version.
.TP
.BI \-x \ address
Send reverse (\fIPTR\fR) query for IPv4 or IPv6 \fIaddress\fR. Correct name,
class and type is set automatically.
.TP
.B \-y \fR[\fIalgo:\fR]\fIkeyname:key\fR
Use TSIG key with a name \fIkeyname\fR to authenticate the request. The \fIalgo\fR
part specifies the algorithm (the default is hmac\-md5) and \fIkey\fR specifies
the shared secret encoded in Base64.
.TP
.BI \-E \ tapfile
Export a dnstap trace of the query and response messages received to the file
\fItapfile\fR.
.TP
.BI \-G \ tapfile
Generate message output from a previously saved dnstap file \fItapfile\fR.
.TP
.BR + [ no ] multiline
Wrap long records to more lines and improve human readability.
.TP
.BR + [ no ] short
Show record data only.
.TP
.BR + [ no ] aaflag
Set AA flag.
.TP
.BR + [ no ] tcflag
Set TC flag.
.TP
.BR + [ no ] rdflag
Set RD flag.
.TP
.BR + [ no ] recurse
.RB "Same as " + [ no ] rdflag
.TP
.BR + [ no ] raflag
Set RA flag.
.TP
.BR + [ no ] zflag
Set zero flag bit.
.TP
.BR + [ no ] adflag
Set AD flag.
.TP
.BR + [ no ] cdflag
Set CD flag.
.TP
.BR + [ no ] dnssec
Set DO flag.
.TP
.BR + [ no ] all
Show all packet sections.
.TP
.BR + [ no ] qr
Show query packet.
.TP
.BR + [ no ] header
Show packet header.
.TP
.BR + [ no ] opt
Show EDNS pseudosection.
.TP
.BR + [ no ] question
Show question section.
.TP
.BR + [ no ] answer
Show answer section.
.TP
.BR + [ no ] authority
Show authority section.
.TP
.BR + [ no ] additional
Show additional section.
.TP
.BR + [ no ] tsig
Show TSIG pseudosection.
.TP
.BR + [ no ] stats
Show trailing packet statistics.
.TP
.BR + [ no ] class
Show DNS class.
.TP
.BR + [ no ] ttl
Show TTL value.
.TP
.BR + [ no ] tcp
Use TCP protocol (default is UDP for standard query and TCP for AXFR/IXFR).
.TP
.BR + [ no ] fail
Stop querying next nameserver if SERVFAIL response is received.
.TP
.BR + [ no ] ignore
Don't use TCP automatically if truncated reply is received.
.TP
.BR + [ no ] nsid
Request nameserver identifier (NSID).
.TP
.BR + [ no ] edns= N
Use EDNS version (default is 0).
.TP
.BR +noidn
Disable IDN transformation to ASCII and vice versa.
IDNA2003 support depends on libidn availability during project building!
.TP
.BI +client= SUBN
Set EDNS client subnet SUBN=IP/prefix.
.TP
.BI +time= T
Set wait for reply interval in seconds (default is 5 seconds).
This timeout applies to each query try.
.TP
.BI +retry= N
Set number (>=0) of UDP retries (default is 2). This doesn't apply to AXFR/IXFR.
.TP
.BI +bufsize= B
Set EDNS buffer size in bytes (default is 512 bytes).
.SH NOTE
Options \fB\-k\fR and \fB\-y\fR cannot be used mutually.
.SS Missing features with regard to ISC dig
Options \fB\-f\fR and \fB\-m\fR and query options:
.BR
.BR +split=\fIW\fR ,\  +tries=\fIT\fR ,\  +ndots=\fID\fR ,
.BR
.BR +domain=\fIsomename\fR , +trusted\-key=\fI####\fR ,
.BR
.BR + [ no ] vc ,\  + [ no ] search ,\  + [ no ] showsearch ,
.BR
.BR + [ no ] defname ,\  + [ no ] aaonly ,\  + [ no ] cmd ,
.BR
.BR + [ no ] identify ,\  + [ no ] comments ,\  + [ no ] rrcomments ,
.BR
.BR + [ no ] onesoa ,\  + [ no ] besteffort ,\  + [ no ] sigchase ,
.BR
.BR + [ no ] topdown ,\  + [ no ] nssearch ,\  + [ no ] trace.
.TP
Per-user file configuration via ${HOME}/.digrc.
.SH EXAMPLES
.B Example 1. Get A record for example.com:
.TP
# kdig example.com A
.TP
.B Example 2. Perform AXFR for zone example.com from the server 192.0.2.1:
.TP
# kdig example.com \-t AXFR @192.0.2.1
.TP
.B Example 3. Get A record for example.com from 192.0.2.1 and reverse \
lookup for address 2001:DB8::1 from 192.0.2.2. Both using TCP protocol:
.TP
# kdig +tcp example.com \-t A @192.0.2.1 \-x 2001:DB8::1 @192.0.2.2
.SH FILES
.I /etc/resolv.conf
.SH AUTHOR
Daniel Salzman (\fBwww.knot\-dns.cz\fR)
.TP
Please send any bug reports or comments to \fBknot\-dns@labs.nic.cz\fR
.SH SEE ALSO
.BR khost (1),
.BR knsupdate (1).