The computer firewall safeguards our computer system against hackers.
Packet filtering is the principal function of a firewall.
When a computer transmits a request across the Internet, it does so as a tiny packet of data.
These data packets proceed to their destination across the network.
If the firewall determines that the packet is not permitted.
The data is discarded.
In a software firewall, packet filtering is accomplished by a program known as a packet filter.
Packet filtering is a component of a firewall application that protects a network against unauthorized access.
The packet filter rules must be followed to either permit or deny packets.
You may configure a rule to deny packets.