3-1 Flashcards
a single point of contact between the internet and a private network
bastion host
a firewall that authenticates each user before granting access
circuit level gateway firewall
a firewall type consisting of two firewalls with an intermediate zone between them
DMZ
an attack that prevents legitimate users from accessing a resource
DOS
a type of firewall that literally has 2 NICs
dual homed host
a barrier between the network and the outside world
firewall
software where the source code is freely available to the public
open source
the process of securing an individual OS. This includes proper configuration and applying patches
OS hardening
a firewall that scans incoming packets and either allows them to pass or rejects them
packet filter firewall
a device that hides your internal network from the outside world
proxy server
a combination of firewalls in this configuration you use a combination of a bastion and a screening router
screened host
at a minimum a firewall will filter __________ based on parameters such as packet size, source, IP address, protocol, and destination port
incoming packets
4 basic types of firewalls
packet filtering, application gateway, circuit-level gateway, stateful packet inspection
this is the most basic type of firewall. each incoming packet is analyzed. only packets matching criteria are allowed through. also, known as screening firewalls
packet filtering firewalls
the can be filtered based on packet size, the protocol used, source IP address, and many other parameters
packet filtering firewalls
