Introduction to FootPrinting

FootPrinting is the first step of Gathering Information about the systems of the organization we are trying to exploit.
Footprinting is a simple concept of revealing vulnerabilities in systems and the ease with which it can be exploited.
Purpose:-
Find ways to intrude into the systems and environments. It also includes creation of a map or BluePrint of Organization's Network.

A simple way for gathering information is GOOGLE the GURU.
So as to find out parameters , Some file types or some content in the URL.
Some Tools like samSpade, NSlookUp, WhoIs, DNSLookUp and many more are available.

DNS ENUMERATION:-
DNS or Domain Name Server is the process of locating all DNS servers and corresponding records.
Serching out for information about servers is made easy with help of various online available resources like

1.ARIN (American Registry for Internet Numbers)
Click here to view ARIN Website .
2.APNIC (Asia Pacific Network Information Centre)
Click Here to view APNIC Website .
3.LACNIC (Latin America And  Caribbean Network Information Centre)
Click Here to view LACNIC Website
4.RIPENCC for europe continent.
5.AFRINIC for africa continent.

DNS Record Types
1.A(Address):- Map Host Name to IP Address.
2.SDA(Start Of Authority):- Identify DNS Server responsible for Domain Information.
3.CNAME(Canonical Name):- Provide Additional Name of aliases for Address Records
4.MX(Mail Exchange):- Identify Mail Server For Domain.
5.SRV(Service):- Identify Services such as Directory Services.
6.PTR(Pointer):- Map IP Address To Host Names.
7.NS(Name Server):-Identify other Name services for Domain.