$ for sub in $(cat /opt/useful/SecLists/Discovery/DNS/subdomains-top1million-110000.txt);do dig $sub.inlanefreight.htb @10.129.14.128 | grep -v ';\|SOA' | sed -r '/^\s*$/d' | grep $sub | tee -a subdomains.txt;done
ns.inlanefreight.htb. 604800 IN A 10.129.34.136
mail1.inlanefreight.htb. 604800 IN A 10.129.18.201
app.inlanefreight.htb. 604800 IN A 10.129.18.15
for sub in $(cat /opt/seclists/Discovery/DNS/fierce-hostlist.txt);do dig $sub.inlanefreight.htb @10.129.104.34 | grep -v ';\|MX' | sed -r '/^\s*$/d' | grep $sub | tee -a subdomains.txt;done
