Types of Firewalls
A firewall is a network security device or application that monitors incoming and outgoing network traffic and decides whether to allow or block specific traffic based on a predefined set of security rules. A firewall can be hardware, software, or both.
Firewalls are designed for both stand-alone computers and for a network. Host-based Firewall and Network-based Firewall. Host-based firewalls are inbuilt or third-party applications installed on individual workstations or servers and monitor incoming and outgoing activities. A network-based firewall could be a hardware, application, or both. A network-based firewall can be installed on the administrator’s system to monitor incoming and outgoing activities between computers in the network.
Types of Firewalls:
Types of firewalls are included:
Packet-filtering firewalls, Stateful inspection firewalls, Proxy firewalls, Unified threat management (UTM) firewalls and next-generation firewalls (NGFW).
- A packet-filtering firewall examines every packet that passes in the network. Packet-filtering firewalls work at the Network layer of the OSI networking model. k. A Packet-filtering firewall examines the packet headers that contain IP addresses and packet options and blocks or allows traffic depending on the set of rules in the firewall configuration.
- A Stateful inspection firewall allows or blocks traffic based on state, port, and protocol. It monitors all activity from the opening to the closing of a connection. Filtering and motioning are made based on a set of rules.
- A proxy firewall works at the application layer of the Open Systems Interconnection (OSI) reference model.
- Unified threat management (UTM) firewall. UTM Firewall is combined along with other security services in UTM Router. It provides multiple security features and services in a single device or service on the network, protecting users from security threats in a simplified way. UTM functions and services also include anti-virus, anti-spam, content filtering, and web filtering.
- An NGFW uses a multilayered approach to integrate enterprise firewall capabilities with an intrusion prevention system. Most companies are deploying next-generation firewalls to block advanced threats like malware and application-layer attacks.
Host and Network Firewall:
Both Host-based and network-based firewall configurations are necessary for a computer network. Check on network security for more information about firewalls and other security mechanisms necessary for securing an individual computer and the entire network.