What is Firewall
A firewall is a system that is designed to prevent unauthorized access from entering a private network.
creates a safety barrier between a private and the public internet.
Firewall rules can be based on:
. IP address
. Domain names
. Key words
1. Host-based firewall :-
# Software firewall that is installed on a computer.
# Protect that computer only
# A lot of antivirus programs come with a host-based firewall
# Host_based firewall example:- Microsoft Windows Firewall
2. Network based firewall :-
# Combination of hardware and software
# Protects an Entire network
3. Stand-alone firewall
4. Routers have a built-in firewall
5. Cloud firewall