Unformatted text preview: a second generation firewall, it validates TCP and UDP sessions before it opens a connection. The circuit-level gateway can translate the IP address between the Internet and the internal systems on your network. Application level gateways are also important. They take requests from the internet service, and forward it to the actual service. Each system can talk to the gateway rather then talking to the each other directly. As for the most efficient, it really depends on where you are. Packet filtering firewalls seem to be the most basic. Each network packet reaching the firewall is evaluated based on it’s source. Where stateful inspection firewalls are really the most commonly deployed. This is because they build upon packet filters, using the firewall to maintain information about the state of each active connection....
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- Spring '10
- Networking, Computer network, IP address, Transmission Control Protocol, Packet filtering