Firewall

In computing, a firewall is a network security system that controls the incoming and outgoing network traffic based on an applied rule set. A firewall typically establishes a barrier between a trusted, secure internal network and another network (e.g., the Internet) that is assumed not to be secure and trusted.[1]

Software firewalls are server-based and form the last-line of defence for server infrastructure. Routers, Hardware firewalls, the DMZ, AirGaps, Proxies are other perimeter defence mechanisms.

• Firewall History
• Firewall Features
  • Packet Filter
  • App Gateway
  • Bastion
  • SPI
• Firewall Usage
• Firewall Training

Related

• iptables
• Cisco Routers
• Proxy
• DMZ
• Routers
• Networking

Links

• https://en.wikipedia.org/wiki/Firewall_(computing)