In what scenario should a stateful inspection firewall and a packet-filtering firewall be used?
By submitting your email address, you agree to receive emails regarding relevant topic offers from TechTarget and its partners. You can withdraw your consent at any time. Contact TechTarget at 275 Grove Street, Newton, MA.
In general, firewalls that make use of stateful inspection are the industry norm. Stateful inspection replaced packet filtering in most environments several years ago, and the majority of modern firewall systems take advantage of it.
The main difference between the two firewalls is that stateful inspection systems maintain a state table, allowing them to keep track of all open connections through a firewall, while packet-filtering firewalls do not. When traffic arrives, the system compares the traffic to the state table, determining whether it is part of an established connection.
The only place you'll likely see packet filtering in today's environment is at an Internet-facing router. These devices often implement a basic packet-filtering rule set to weed out obviously unwanted traffic and reduce the load on a stateful inspection firewall immediately behind the router.
Dig Deeper on Network Firewalls, Routers and Switches
Related Q&A from Mike Chapple
Cloud compliance issues are no reason for enterprises not to move to the cloud. Expert Mike Chapple explains why, as well as what to keep in mind ...continue reading
The GAO reported on SEC cybersecurity weaknesses, even though the SEC regulates cybersecurity. Expert Mike Chapple discusses the effects of this ...continue reading
Enterprise compliance can be a burden to manage, which is where a PCI ISA can be helpful. Expert Mike Chapple explains how a PCI Internal Security ...continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.