A cloud firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules, but it is hosted and managed in the cloud rather than on-premises. It acts as a barrier between a trusted internal network and untrusted external networks, such as the internet, to protect cloud-based applications, data, and infrastructure from cyber threats like unauthorized access, malware, and DDoS attacks.
Cloud firewalls are designed to scale with cloud environments, providing flexible and dynamic protection for resources that may be distributed across multiple regions or platforms. They can be configured to enforce security policies consistently across hybrid or multi-cloud setups.
Example: A company hosting its e-commerce website on a cloud platform uses a cloud firewall to block malicious IP addresses and prevent SQL injection attacks. The firewall also monitors traffic patterns to detect unusual activity, such as a sudden spike in requests that could indicate a DDoS attack.
For cloud-based security solutions, Tencent Cloud's Security products like the Web Application Firewall (WAF) and Anti-DDoS Service provide robust protection for applications and infrastructure in the cloud. These services help safeguard against common web threats and ensure high availability for business operations.