So far, we have read four chapters that are related from the data link layer to the transport layer. Now, we move on to application layer penetration testing. In this chapter, we will go through the following topics:
The concept of foot printing of a web server
Introducing information gathering
HTTP header checking
Information gathering of a website from smathwhois.com by the parser BeautifulSoup
Banner grabbing of a website
Hardening of a web server