Denied DNS Requests
From James Dooley's Wiki
Overview
Find denied queries against DNS, good for finding sites that are no longer hosted or do not have valid DNS records.
Get all denied domains
[bash,n]
cat /var/log/messages | grep named | grep denied | cut -d "'" -f2 | cut -d "/" -f1 | sort | uniq -ci | sort -nr > /root/denied_dns.txt
Create dummy zone for top 10 domains
This will create a zone file using cPanels add_dns script and point it to 127.0.0.1 for the top 10 domains.
[bash,n]
cp -r /var/named /var/named.bak
for domain in $(head /root/denied_dns.txt | awk '{print $2}' | sed 's/www\.//'); do echo "Adding $domain"; /scripts/add_dns --domain $domain --ip 127.0.0.1; done
