NAME

check_soa - Check nameservers for a domain in parallel

SYNOPSIS

check_soa [-d] [-t] [-v] domain [server]

DESCRIPTION

Each nameserver for the specified domain is queried for the relevant SOA record and the zone serial number printed.

Error reports are generated for nameservers which reply with non-authoritative, outdated or incorrect information.

SOA query packets are sent to the nameservers as rapidly as the underlying hardware will allow. The program waits for a response only when it is needed for analysis. Execution time is determined by the slowest nameserver.

This program is based on the check_soa idea described by Albitz and Liu.

OPTIONS AND ARGUMENTS

-d: Turn on resolver diagnostics.
-t: Ignore UDP datagram truncation.
-v: Verbose output including address records for each server.
domain: Fully qualified name of domain to be tested.
server: Name or list of IP addresses of DNS nameserver to be tested.

BUGS

The timeout code exploits the 4 argument form of select() function. This is not guaranteed to work in non-Unix environments.

COPYRIGHT

This program is free software; you may use or redistribute it under the same terms as Perl itself.

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