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Analysing tools (5 processing mode to categorize firewalls by (Circuit…
Analysing tools
5 processing mode to categorize firewalls by
Circuit gateways
operates at the transport layer
prevents direct connections between one network and another
Application gateways
operate at the applicaxtion layer
frequently installed on a dedicated computer know as the proxy server
Packet filtering
examine header info of data packets
Operates at IP layer
Hybrids
these combine elements of other types of firewalls
I.e elements of packet filtering and proxy services
or can consist of 2 separate firewall devices
MAC layer Firewalls
operates at the data link layer of the OSI network model
they consider a specific host com identity in its filtering decisions
Various firewall architectures
screened host firewall
combines a packet filtering router with a separate, dedicated firewall such as an application proxy server
dual-homed host firewall
Packet filtering routers
NEG- these devices norm lack of auditing and strong authentication
routers can be configured to only allow specific packers in
Screened Subnet (DMZ)
Dominant architecture used today is the screened subnet firewall
Virtual Private Networks (VPNs)
Vpns must accomplish
encapsulation of incoming and outgoing data
enccryption of incoming and outgoing data
Authentication of remote comp
3 vpn tech defined
Trusted
Secure
Hybrid
priv and secure network connection betweek systems
tools