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adammcmaster/dnsdiff.sh

Created July 6, 2020 13:32
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dnsdiff.sh
#!/bin/bash
# Based on https://stackoverflow.com/a/29079962/10955319
SOURCE_NS=$1
DEST_NS=$2
ZONE=$3
if [ "$SOURCE_NS" == "" ] || [ "$DEST_NS" == "" ] || [ "$ZONE" == "" ]
then
echo "USAGE: $0 source_nameserver destination_nameserver zone_name_or_file"
exit 1
fi
if [ -f $ZONE ]
then
ZONES=$(cat $ZONE)
else
ZONES=($ZONE)
fi
diff <(sort -u <(for host in $ZONES; do dig +nottlid +noall +answer @$SOURCE_NS $host ANY; done) ) \
<(sort -u <(for host in $ZONES; do dig +nottlid +noall +answer @$DEST_NS $host ANY; done) )
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