1.7.1 Firewalls

Firewalls are software or hardware components that decide what messages can pass through and what cannot. It is like the gatekeeper with a set of rules and policies. They perform the following functions.

  • Filter the incoming traffic
  • Log events
  • Detect intrusion attacks and alert
  • Authenticate users
  • Perform basic content screening
  • Enforce corporate network security policy

In this context, some of the threats that can be reduced are Denial of Service (DOS) attacks, IP spoofing, data thefts, virus attacks, etc. The growing importance of firewalls

Firewalls have always been a part of the web due to the reasons mentioned above. However, the pattern of usage has been growing in such a way that ...

Get Web Technology: Theory and Practice now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.