https://www.sangfor.com en Wed, 28 Oct 2026 14:04:02 +0800 Fri, 02 Dec 2022 15:38:35 +0800 https://www.sangfor.com/glossary/cybersecurity/what-is-a-firewall A firewall is a network security device that acts as the gatekeeper for your computer, device, or network. It monitors and screens traffic to and from your device and prevents any ... 51c98917-b9b2-4a12-86bf-be0d7f5c5b07 Fri, 02 Dec 2022 15:38:35 +0800 Sangfor Sangfor Technologies