DNS Cheatsheet

DNS Enumaration

Nslookup

Resolve a given hostname to the corresponding IP.

nslookup targetorganization.com

Reverse DNS lookup

nslookup -type=PTR IP_address

MX(Mail Exchange) lookup

nslookup -type=MX domain

Zone Transfer

Using nslookup Command

nslookup server domain.com ls -d domain.com

Using HOST Command

host -t ns(Name Server) < domain >

host -t ns domain.com

after that test nameservers

host -l < domain > < nameserver >

host -l domain.com ns2.domain.com

Nmap Dns Enumaration

nmap -F --dns-server <dns server ip> <target ip range>

Auto tools

DNSenum

dnsenum targetdomain.com

dnsenum --target_domain_subs.txt -v -f dns.txt -u a -r targetdomain.com

DNSmap

dnsmap targetdomain.com

dnsmap targetdomain.com -w <Wordlst file.txt>

Brute Force, the file is saved in /tmp

dnsmap targetdomain.com -r

DNSRecon DNS Brute Force

dnsrecon -d TARGET -D /usr/share/wordlists/dnsmap.txt -t std --xml ouput.xml

Fierce.pl

fierce -dns targetdomain.com

HostMap

hostmap.rb -only-passive -t <IP>

We can use -with-zonetransfer or -bruteforce-level

Online Tools

• https://dnsdumpster.com/
• https://network-tools.com/nslook/
• https://www.dnsqueries.com/en/
• https://mxtoolbox.com/