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DNS Enumeration

DNS enumeration is the process of locating all the DNS servers and their corresponding records for an organization. DNS enumeration will yield usernames, computer names, and IP addresses of potential target systems. The list of DNS record provides an overview of types of resource records (database records) stored in the zone files of the Domain Name System (DNS). The DNS implements a distributed, hierarchical, and redundant database for information associated with Internet domain names and addresses.

DNS Zone Transfer used to replicate DNS data across a number of DNS servers or to back up DNS files. A user or server will perform a specific zone transfer request from a ―name server. If the name server allows zone transfers by an anonymous user to occur, all the DNS names and IP addresses hosted by the name server will be returned in human-readable ASCII text.

Tools:

nslookup, maltego, dnenum,dnsrecon

Countermeasures:

Disable Zone transfer by untrusted hosts
Ensure that private hostnames are not referenced to IP addresses within the DNS zone files of publicly accessible DNS servers.
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DNS Enumeration

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Countermeasures:

Related Topics

Company

Resources

Bootcamps

Premium Resources

Free Resources

DNS Enumeration

Tools:

Countermeasures:

Related Topics

Ethical Hacking

Introduction to Ethical Hacking

Footprinting and Reconnaissance

Scanning

Enumeration

System Hacking

Malware Threats

Sniffing

Social Engineering

Denial of Service

Session Hijacking

Hacking Web Servers

Web Application Attacks

SQL Injection

Hacking Wireless Networks

Hacking Mobile Devices

Evading Firewall/IDS and Honey Bots

Cryptography

Cloud Computing