3-2 Flashcards
free packet filtering app for linux. installed on linux machine designed to be used as your network firewall
Firestarter
this product is inexpensive and available for windows only
avast internet security
this proiduct is reasonably priced and effective
zone alarm firewall
commercial firewall product that works with windows clients. it includes both firewall and and antivirus functionality
comodo firewall
in packet filtering firewall they usually do not examine the packet or compare it to ___________ making them susceptible to ping and syn flood attacks
precious packets
this type of firewall does not offer user authentication
packet filtering firewall
with packet filtering firewall it does not track packets so it has not information about the ____________
preceeding packets
to configure a packet filtering firewall, simply establish appropriate filtering rules. a set of rules for a given firewall would need to cover the following
what types of protocols,
source ports,
destination port,
source IP address to allow
this firewall is an improvement on basic packet filtering. it will examine each packet and grant of denying access based not only on the examination of the current packet but also on data derived from the previous packet in the conversation.
stateful packet inspection
with a stateful packet inspection means that the firewall is aware of the contextin which ____________
a specific packet was sent
SPI firwalls are far less suseptable to ___________ attacks
syn and ping flood
a stateful packet inspection firewall can tell if a packet is a part of an abnormally large stream of packets from a particular IP address, thus indicating a possible _____________
DOS attack in progress
they can tell whether the packet hasa a source IP address that appears to come from inside the firewall, thiu indicating ____________
ip spofing is in progress
they can also look at the actual contents of the packet, allowing for some very ___________
advanced filtiring capabilities
spi firewalls are basically imroved versions of ________
packet filtering firewalls