https://www.sangfor.com en Thu, 04 Jun 2026 07:51:10 +0800 Fri, 15 Jan 2021 08:00:00 +0800 https://www.sangfor.com/blog/cybersecurity/faqs-firewall What is a firewall? A firewall is an element of network security designed to act as a gatekeeper for incoming and outgoing traffic, allowing safe traffic through and stopping po... af9ff56e-9f36-4a53-a12c-2eb90729cd3a Fri, 15 Jan 2021 08:00:00 +0800 Sangfor Sangfor Technologies