Nslookup
nslookup — Query Internet domain name servers for information.
Synopsis
Description
The nslookup command is a network administration tool used for querying Domain Name System (DNS) servers to obtain domain name or IP address mapping, and other DNS records. It is widely used to troubleshoot DNS-related issues and to gather information about domain names and IP addresses.
Basic Usage
This basic usage queries the default DNS server for information about the specified domain (e.g., example.com) and returns the IP address associated with it.
For example:
Options
[domain_name]The domain name for which you wish to look up information. If omitted,
nslookupwill query the default DNS server and provide information on its configuration.
server [DNS_server]Specifies a particular DNS server to query instead of using the default server.
This will query Google's DNS server (8.8.8.8) for the domain
example.com.-type=record_typeSpecifies the type of DNS record to query. Common types include:
A: Address record (IPv4 address)
AAAA: Address record (IPv6 address)
MX: Mail Exchange record
CNAME: Canonical Name record
NS: Name Server record
PTR: Pointer record (reverse DNS)
TXT: Additional data used for domain verification purpose
SOA: Statement of Authority records of the target domains.
This will return the mail server information for
example.com.-timeout=secondsSets the time to wait for a response from the DNS server before timing out.
-debugDisplays detailed information about the query, including the server response and intermediate steps.
-retry=nSpecifies the number of retry attempts if the DNS server fails to respond.
-port=port_numberSpecifies a custom port for the DNS server to use.
set [option]This is used to modify the behavior of
nslookupfor the current session. Some commonsetoptions include:set type=record_type: Changes the type of record to query (e.g.,set type=MX).set querytype=record_type: Equivalent to-type=record_type.set debug: Enables debugging output.set port=port_number: Sets a custom DNS server port.set timeout=seconds: Adjusts the query timeout.
Example:
DNS ZONE TRANSFER
Perform DNS Enumeration using Zone Transfer
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