Web infrastructure

Theory

Practice

shodan : net:"SUBNET/MASK"

zoomeye : IP/MASK

fofa.so

Get the DNS servers, their records, and map the domain:
-https://dnsdumpster.com/
IP énumération + response header from domain name:
-https://zoomeye.org
Find subdomains:
-https://findsubdomains.com
Find technologies used and versions of a webapp:
-https://github.com/urbanadventurer/WhatWeb

Website caching platforms:
-https://archive.org/
-https://archive.fo/

Google Analytics:

• The last piece of information that is really interesting is to check if the same Google Analytics / Adsense ID is used in several websites. This technique was discovered in 2015 and is well described here by Bellingcat.
• Certificats?

Using Google Dorks to find subdomains

# find subdomains
site:"something.com"

# without www and subd1
site:"something.com" -www -subd1