DNSCHECK-PREFLIGHT(1)

NAME
dnscheck-preflight - quickly check if a name seems to be a delegated domain or not

DESCRIPTION
The dnscheck-preflight script takes a name and tries to figure out if that name corresponds to a delegated domain or not, without taking too much time about it (at least in theory, it should never use more than just over six seconds).

There are no options. The script will print the string TRUE to standard output if it thinks the name is a delegated domain, and the string FALSE otherwise.

A domain will be considered to exist if any of the following is true:

•   An NS record can be found.

•   A SOA record can be found.

•   A query for either of the above gets a SERVFAIL response.

•   A query for either of the above times out.

EXAMPLE
    dnscheck-preflight iis.se