NAME

       ldns-verify-zone - read a DNSSEC signed zone and verify it.

SYNOPSIS

       ldns-verify-zone ZONEFILE

DESCRIPTION

       ldns-verify-zone reads a DNS zone file and verifies it.

       RRSIG resource records are checked against the DNSKEY set at the zone apex.

       Each name is checked for an NSEC(3), if appropriate.

       If ZONEMD resource records are present, one of them needs to match the zone content.

OPTIONS

       -h     Show usage and exit

       -a     Apex only, check only the zone apex

       -e period
              Signatures may not expire within this period.  Default no period is used.

       -i period
              Signatures must have been valid at least this long.  Default signatures should just
              be valid now.

       -k file
              A file that contains a trusted DNSKEY or DS rr.  This option may be given more than
              once.

              Alternatively,   if   -k   is   not   specified,   and   a   default  trust  anchor
              (/usr/share/dns/root.key) exists and contains a valid DNSKEY or DS record, it  will
              be used as the trust anchor.

       -p [0-100]
              Only  check  this  percentage  of  the  zone.   Which  names to check is determined
              randomly.  Defaults to 100.

       -S     Chase signature(s) to a known key.  The network may be  accessed  to  validate  the
              zone's DNSKEYs. (implies -k)

       -t YYYYMMDDhhmmss | [+|-]offset
              Set the validation time either by an absolute time value or as an offset in seconds
              from the current time.

       -v     Show the version and exit

       -V number
              Set the verbosity level (default 3):

               0: Be silent
               1: Print result, and any errors
               2: Same as 1 for now
               3: Print result, any errors, and the names that are
                  being checked
               4: Same as 3 for now
               5: Print the zone after it has been read, the result,
                  any errors, and the names that are being checked

       -Z     Requires a valid ZONEMD RR to be present. When given once, this option will  permit
              verifying  only  the  ZONEMD RR of an unsigned zone. When given more than once, the
              zone needs to be validly DNSSEC signed as well.

       -ZZZ   When three times a -Z option is given, the ZONEMD RR to be verified  is  considered
              "detached" and does not need to have valid signatures.

       periods are given in ISO 8601 duration format:
              P[n]Y[n]M[n]DT[n]H[n]M[n]S

       If no file is given standard input is read.

FILES

       /usr/share/dns/root.key
              The  file  from  which  trusted  keys  are loaded for signature chasing, when no -k
              option is given.

SEE ALSO

       unbound-anchor(8)

AUTHOR

       Written by the ldns team as an example for ldns usage.

REPORTING BUGS

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

COPYRIGHT

       Copyright (C) 2008 NLnet Labs. This is free software. There is NO warranty; not  even  for
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

                                           27 May 2008                         ldns-verifyzone(1)