A Cloud Firewall typically supports multiple network protocols to ensure comprehensive security for cloud-based resources. Commonly supported protocols include:
TCP (Transmission Control Protocol) – Used for reliable, connection-oriented communication, such as web browsing (HTTP/HTTPS), email (SMTP/IMAP/POP3), and file transfers (FTP).
Example: A web server behind a Cloud Firewall uses TCP port 80 (HTTP) and 443 (HTTPS) to serve traffic securely.
UDP (User Datagram Protocol) – Used for connectionless, fast communication, often in real-time applications like VoIP (Voice over IP), video streaming, and DNS queries.
Example: A gaming server may use UDP ports for low-latency communication between players.
ICMP (Internet Control Message Protocol) – Used for network diagnostics, such as ping requests and error reporting.
Example: A Cloud Firewall can block or allow ICMP traffic to prevent unauthorized network probing.
Custom Protocols – Some advanced Cloud Firewalls support application-layer protocols like HTTP, HTTPS, FTP, SSH, and RDP, allowing granular control over specific services.
Example: A Cloud Firewall can restrict SSH (port 22) access to specific IP ranges for secure remote administration.
For cloud security solutions, Tencent Cloud Security Group and Tencent Cloud Network Firewall provide flexible protocol filtering, enabling users to define rules based on TCP, UDP, ICMP, and other protocols to safeguard their workloads.