Definition: Stateful Inspection is a more in-depth form of Packet Filter firewall. While a Packet Filter only checks the packet header to determine the source and destination address and the source and destination ports to verify against its rules, Stateful Inspection checks the packet all the way to the Application Layer. Stateful Inspection monitors incoming and outgoing packets to determine not only source and destination, but also context. By ensuring that only requested information is allowed back in Stateful Inspection helps protect against hacker techniques such as IP spoofing and port scanning.
Also Known As: Dynamic Packet Filter
Editor-in-Chief at TechSpective
I have a passion for technology and gadgets--with a focus on Microsoft and security--and a desire to help others understand how technology can affect or improve their lives. I also love spending time with my wife, 7 kids, 4 dogs, 7 cats, a pot-bellied pig, and sulcata tortoise, and I like to think I enjoy reading and golf even though I never find time for either. You can contact me directly at tony@xpective.net. For more from me, you can follow me on Twitter, Facebook, Instagram and LinkedIn.
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