Gather DNS Information using nslookup Command Line Utility and Online Tool
nslookup is a network administration command-line utility, generally used for querying the DNS to obtain a domain name or IP address mapping or for any other specific DNS record. This utility is available both as a command-line utility and web application.
Here, we will perform DNS information gathering about target organizations using the nslookup command-line utility and NSLOOKUP web application.
In the nslookup interactive mode, type set type=a and press Enter. Setting the type as “a” configures nslookup to query for the IP address of a given domain.
Type set type=cname and press Enter. The CNAME lookup is done directly against the domain's authoritative name server and lists the CNAME records for a domain.
The authoritative name server stores the records associated with the domain. So, if an attacker can determine the authoritative name server (primary name server) and obtain its associated IP address, he/she might attempt to exploit the server to perform attacks such as DoS, DDoS, URL Redirection, etc.
You can also perform the same operations using the NSLOOKUP online tool. Conduct a series of queries and review the information to gain familiarity with the NSLOOKUP tool and gather information
pen any web browser (here, Mozilla Firefox). In the address bar of the browser place your mouse cursor and type services/nslookup.php and press Enter
Get me here
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Please watch: "Decoding Enumeration Techniques and Bit Steganography"
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