SDIG(1)

NAME
sdig - Perform a DNS query and show the results

SYNOPSIS

sdig IP-ADDRESS-OR-DOH-URL PORT QNAME QTYPE [OPTION]

DESCRIPTION

sdig sends a DNS query to IP-ADDRESS-OR-DOH-URL on port PORT and displays the answer in a formatted way. If the address starts with an h, it is assumed to be a DoH endpoint, and PORT is ignored. If qname and qtype are both - and tcp is used, multiple lines are read from stdin, where each line contains a qname and a type. If the address is stdin, a DNS packet is read from stdin instead of from the network, and PORT is ignored. All input is literal and case sensitive. Queries need option recurse to expect a resource record reply if the query target is not known to be the authoritative server for that record.

OPTIONS

These options can be added to the commandline in any order.

    class CLASSNUM
        Send the query in the numbered class (like 3 for CHAOS) instead of the default 1 (for IN).

    dnssec
        Set the DO bit to request DNSSEC information.

    ednssubnet SUBNET
        Send SUBNET in the edns-client-subnet option. If this option is not set, no edns-client-subnet option is set in the query.

    hidesoadetails
        Don't show the SOA serial in the response.

    hidettl
        Replace TTLs with [ttl] in the response.

    proxy TCP? SRC DST
        Wrap query in PROXYv2 protocol with these parameters. The first parameter accepts 0 for UDP and 1 for TCP. The second and third take IP addresses and port.

    recurse
        Set the RD bit in the question.

    showflags
        Show the NSEC3 flags in the response (they are hidden by default).

    dumpluaraw
        Display record contents in a form suitable for dnsdist's SpoofRawAction.

    tcp Use TCP instead of UDP to send the query.

    dot use DoT instead of UDP to send a query. Implies tcp.

    insecure
        when using DoT, do not validate the server certificate.

    fastOpen
        when using TCP or, DoT, enable TCP Fast Open

    subjectName name
        when using DoT, verify the server certificate is issued for name. The openssl provider will accept an empty name and still make sure the certificate is issued by a trusted CA, gnutls will only do the validation if a name is given. Default is the empty name. Also, note that older provide libraries might not validate at all.

    caStore file
        when using DoT, read the trusted CA certificates from file. Default is to use the system provided CA store.

    tlsProvider name
        when using DoT, use TLS provider name. Currently supported (if compiled in): openssl and gnutls. Default is openssl if available.

    xpf XPFCODE XPFVERSION XPFPROTO XPFSRC XPFDST
        Send an XPF additional with these parameters.

EXAMPLES

    Simple queries to local resolvers
        sdig 127.0.0.1 53 example.com AAAA recurse sdig ::1 53 example.com A recurse

    Query to a DNS-over-HTTPS server requesting dnssec and recursion
        sdig https://dns.example.net/dns-query 443 example.com A dnssec recurse

AUTHOR
PowerDNS.COM BV

COPYRIGHT
2001-2022, PowerDNS.COM BV