Firewalls
Firewalls are a network security device that monitors outgoing and incoming traffic. It acts as a barrier between secured internal networks and outside the untrusted network.
Generation of fireball:
Fireballs can be categorized into the follows types according to their generation:
- Packet Filtering Firewall
- Stateful Inspection Firewall
- Application Layer Firewall
- Next-Generation Firewall
Packet Filtering Firewalls
It is used to control network access by managing packets. It treats each packet in isolation and hence has no ability to tell if a packet is from an existing stream of traffic or not.
Stateful Inspection Firewall
It determines the connection state of a packet, by keeping track of the state of the network’s connection travelling across it.
Application Layer Firewall
It inspects and filters packets from the OSI layer to the application layer. It can block them if it recognizes misuse of application protocols such as HTTP, FTP, etc.
Next-Generation Firewall
It helps stop modern-day breaches like advanced malware attacks.
Types of firewalls
Different types of firewalls are as follows:
- Host-Based Firewall
- Network-Based Firewall
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