Firewall
A part of a computer system or network designed to block unauthorized access while permitting outward communication.
Stateful Inspection
... [Show More] Firewall
The inbound and outbound data packets are compared to determine if a connection should be allowed.
Proxy Server
The client gets access to the network via the ____________________________. This step is used to authenticate the user, establish the session, and set policies.
Packet Filtering Firewall
Can also limit information moving from one segment to another.
Packet Filtering Firewall
Explicit ports must be opened to allow incoming and outgoing traffic.
Stateful Inspection Firewall
A _____________________________ type of Firewall operates at OSI Layers 3 (Network), 4 (Transport), 5 (Session).
Firewall
________________ rules are called Access Control Lists (ACLs).
Application Level Firewall
The ________________________________ Firewall operates at OSI Level 7 and below.
Access Control Lists (ACLs)
allow or disallow traffic based on tuples (groups of variables like Source IP, Dest IP, Port Number, time, etc)
Application Level Firewall
Sometimes known as a proxy firewall.
Packet Filtering Firewall
A limit is placed on the packets that can enter the network. Compares traffic against pre-established criteria.
Application Level Firewall
Requires decode of the packets. Looks at actual data inside packets.
Stateful Inspection Firewall
EVERY packet is analyzed, categorized and a security decision is made.
Application Level Firewall
Blocks program-level traffic. Analyzes packet content.
Packet Filtering Firewall
A _____________________________ type of Firewall operates at Layer 3 (the IP Layer) and Layer 4 ( the TCP and UDP port numbers)
Application Level Firewall
Called application layer gateway, stateful multilayer inspection, deep packet inspection or next-gen.
Stateful Inspection Firewall
Tracking the source and destination port numbers and sequence numbers as well as the source and destination IP addresses. Automatically creates rules to permit traffic based on communication type.
Proxy Server
Hides your IP address. Looks at actual data inside packets.
Packet Filtering Firewalls and Stateful Inspection Firewalls
The types of firewalls that look at Data Headers.
Application Level Firewall
You might be able to view Twitter but not post to Twitter because the _____________________________ knows exactly what you should be allowed to do.
Stateless Firewall
Does NOT keep track of traffic flows (no sessions). Needs 2 rules (one to reach destination port, another to allow traffic to come back). Traffic sent outside an active session will be stateless.
Proxy Server
You make a request to the firewall then the firewall makes its own request on your behalf to the internet.
Firewall
Which network device is usually placed in-line between a trusted network and an untrusted network?
Proxy Server
Examines the response that it gets back for malware/danger and sends it to you if its safe [Show Less]