DNS Enumeration

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Sections in This Note

Whois Enumeration

WHOIS is a public database that houses information collected when someone registers a domain name. It is used to identify the nameservers of a particular domain.

DNS Recon

Identify the records related to the domain of the target (dnsdumpster.com)

Subdomain Enumeration with Sublist3r

DNS Zone Transfers

DNS zone transfer (query type AXFR) is a type of DNS transaction and one of the mechanisms available for administrators to replicate DNS databases across a set of DNS servers. A zone transfer uses TCP for transport, in the form of a client-server transaction.

DNS Records

Record	Purpose
A	Resolves a hostname/domain to an IPv4 address
AAAA	Resolves a hostname/domain to an IPv6 address
NS	Reference to the domain nameserver
MX	Resolves a domain to a mail server
CNAME	Used for domain aliases
TXT	Text record
HINFO	Host information
SOA	Domain authority
SRV	Service records
PTR	Resolves an IP address to a hostname