
What is a firewall? - Cisco
A firewall is a network security device that separates a trusted internal network from an external network deemed untrustworthy, such as the internet. It regulates incoming and outgoing …
What Is a Next-Generation Firewall (NGFW)? - Cisco
While a traditional firewall typically provides stateful inspection of incoming and outgoing network traffic, a next-generation firewall includes additional features like application awareness and …
What Is Zero-Trust Networking? - Cisco
A Layer 7 firewall is a new generation of firewall that can examine packet contents to use more of the data within those contents to define authentication criteria.
What Is A Web Application Firewall (WAF)? - Cisco
Web application firewalls (WAFs) are a critical security defense for websites, mobile applications, and APIs. They monitor, filter, and block data packets to and from web applications, protecting …
What Is Network Address Translation (NAT)? - Cisco
Network Address Translation (NAT) is a service that enables private IP networks to use the internet and cloud. NAT translates private IP addresses in an internal network to a public IP …
Teardown vs deny - Cisco Community
Mar 11, 2019 · 02-22-2012 10:06 PM Teardown means that an established connection was deleted from the conn table for whatever reasoson (client of server issuing a FIN or RST, idle …
What is network security? - Cisco
A firewall is a network security device that monitors incoming and outgoing network traffic and decides whether to allow or block specific traffic based on a defined set of security rules.
What is a secure router? - Cisco
Secure routers are equipped with an integrated next-generation firewall (NGFW) to defend against cyberthreats, ensuring sensitive information stays confidential and the network functions …
What is a network gateway? - Cisco
As an entry or exit point for data, a gateway can be used in a variety of security processes, such as a firewall to scan and filter data or a proxy server to maintain restricted access to certain …
Firewalls A firewall is a system or group of systems that manages access between two or more networks