Firewall Network Device, Network Security

Firewall Network Device, Network Security

• 1.
  FIREWALL NETWORK DEVICE
• 2.
  PURPOSE UNDERSTANDING THE PURPOSEOF A FIREWALL
• 3.
  A firewall isa network security device designed to monitor, filter, and control incoming and outgoing network traffic based on predetermined security rules. The primary purpose of a firewall is to establish a barrier between a trusted internal network and untrusted external networks. Firewalls come in both hardware and software forms, and they work by inspecting data packets and determining whether to allow or block them based on a set of rules. Organizations can configure these rules to permit or deny traffic based on various criteria, such as source and destination IP addresses, port numbers, and protocol type.
• 4.
  FUNCTION WHAT DOES AFIREWALL DO?
• 5.
  Firewalls protect againstmalicious traffic. They’re strategically positioned at the network edge or in a data center, allowing them to closely monitor anything attempting to cross this boundary. This visibility also allows a network firewall to granularly inspect and authenticate data packets in real time. This involves checking the data packet against predefined criteria to determine whether it poses a threat. If it fails to meet the criteria, the firewall blocks it from entering or leaving the network.
• 6.
  Firewalls regulate bothinbound and outbound traffic, protecting the network from: External threats such as viruses, backdoors, phishing emails, and denial-of-service (DoS) attacks. Firewalls filter incoming traffic flows, preventing unauthorized access to sensitive data and thwarting potential malware infections. Insider threats like known bad actors or risky applications. A firewall can enforce rules and policies to restrict certain types of outgoing traffic, which helps identify suspicious activity and mitigate data exfiltration.
• 7.
  FEATURES FIREWALL FEATURES
• 8.
  Firewalls have manyfeatures, including packet filtering, intrusion prevention, and threat prevention. These features help protect networks from unauthorized access and cyberattacks. Firewall features: Packet filtering: Stateful inspection: Intrusion prevention: Threat prevention: URL filtering: Application-level gateways: Unified threat management (UTM):
• 9.
  HISTORY FIREWALL HISTORY?
• 10.
  FIREWALLS HAVE EVOLVEDTHROUGH FOUR DISTINCT PHASES: First-generation firewalls began in 1989 with the packet filtering approach. Second-generation firewalls began in the early 2000s. Third-generation firewalls emerged in the latter half of the early 2000s. Fourth-generation firewall, also known as next-generation firewall (NGFW), started in 2010
• 11.
  PRESENTED BY : •Robert Castro Jr. • Isaac Castro • Mark Yhacinth Queddeng • Eroll Juan