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dnscheckserial
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2011-05-22
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41 lines
#! /bin/sh
#
# dnscheckserial [@seed nameserver] <domain>
#
# queries for listed authoritative nameservers for a domain
# then iterates through them quering the SOA record and
# parsing out the serial number.
#
# creates report on all serial numbers
#
# Mirrored from http://lanning.cc/pub/dnscheckserial, with credit to
# Robert Hajime Lanning.
# default query
DOMAIN="."
# parse arguments
while [ "${#}" -gt "0" ]; do
if [ "${1:0:1}" = "@" ]; then
SEED="${1}"
else
DOMAIN="${1}"
fi
shift
done
# report header
echo "Domain: ${DOMAIN}"
echo "Serial # NameServer"
echo "------------- --------------"
# retrieve list of authoritative nameservers and iterate through them
# retrieving SOA record from each and listing the serial number
dig ${SEED} ${DOMAIN} ns +short | sort | uniq |\
while read SERVER; do
SERIAL="`dig \@${SERVER} ${DOMAIN} soa +short +norecurse | sed -e 's/^;; connection timed out.*$/TIMEOUT/' -e '/^;.*$/d' -e '/^$/d' | cut -d' ' -f3` "
SERIAL=${SERIAL:-NXDOMAIN}
echo "${SERIAL:0:13} ${SERVER}"
done