Cloudflare Realtime TURN Service

Cloudflare Realtime TURN Service provides a managed relay solution for WebRTC applications that need to traverse NATs and firewalls. The service maintains public IP addresses and ports for each session, ensuring reliable connectivity even in restrictive network environments.

Key features include:

• Free when used with Realtime SFU, otherwise $0.05/GB outbound
• Global availability across all Cloudflare data centers with automatic anycast routing
• Multiple protocol support: STUN/TURN over UDP, TCP, and TLS
• Flexible port options including standard and alternate ports for different network scenarios
• Modern TLS support (1.1, 1.2, 1.3) with comprehensive cipher suites

The service offers robust performance limits suitable for high-demand applications:

• Packet rates up to 5-10k packets per second
• Data rates supporting 50-100 Mbps per allocation
• Burst capacity above documented limits

Technical specifications:

• Primary addresses: stun.cloudflare.com and turn.cloudflare.com
• Standard ports: 3478 (UDP/TCP), 5349 (TLS)
• Alternate ports: 53 (UDP), 80 (TCP), 443 (TLS)
• No specific MTU limitations

Perfect for developers building real-time communication applications that require reliable peer-to-peer connectivity across diverse network conditions.