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troubleshootingAugust 14, 20267 min readRTSPLink Engineering

How to Access & Test RTSP Camera Streams Behind CGNAT

Bypass ISP Carrier-Grade NAT (CGNAT) without public IPv4 addresses using Cloudflare Tunnels and WebRTC TURN relays.

#CGNAT#Cloudflare Tunnel#Bypass CGNAT#TURN Relay#Networking
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#1Why CGNAT Blocks Port Forwarding

Under CGNAT (100.64.0.0/10), multiple broadband subscribers share a single public IPv4 address. Inbound connection requests to port 554 are rejected by the ISP carrier gateway.

#2The 2 Best CGNAT Solutions

1. WebRTC Relay / TURN Server: Outbound-initiated encrypted media connection that punches through CGNAT. 2. Tailscale / WireGuard Tunnel: Establishes outbound UDP encapsulation allowing full LAN access without open router ports.

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