How to Fix WebRTC WebSocket Connection Issues with Wowza Cloud?

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What does this WebRTC/WebSocket Connection Message Mean?

If you see a message stating “WebRtc Websocket Connections Must be allowed to *.*.cloud.wow za.com on TCP Port 80, 443, 1935,” it points to a connectivity requirement for real-time media streaming.

Your app or service (likely built on Wowza Streaming Cloud) needs to establish WebRTC or WebSocket connections to dynamically generated subdomains like:

python

abc.def.cloud.wowza.com

For these connections to work, traffic must be allowed through these TCP ports:

Port 80: HTTP
Port 443: HTTPS (preferred for secure WebRTC/WebSocket)
Port 1935: RTMP (as a fallback for media streaming)

Without proper access, your real-time video, audio, or data streams won’t connect successfully.

Why are these Specific Ports Required?

Each port serves a specific function in ensuring seamless media streaming:

TCP Port 80:
Standard web traffic (HTTP). Occasionally used if HTTPS is unavailable.
TCP Port 443:
Secure traffic (HTTPS). This is the main channel for WebRTC and WebSocket connections to ensure data is encrypted.
TCP Port 1935:
A traditional port used for RTMP (Real-Time Messaging Protocol) is often used as a fallback if WebRTC connections fail.

By allowing these ports, you guarantee that WebRTC/WebSocket traffic can flow freely, ensuring stable media streams.

How Can Administrators or Developers Fix This Issue?

Step 1: Configure Firewall or Security Rules

Modify your firewall, proxy, or security appliance settings to allow outbound connections to:

*.cloud.wowza.com

Across TCP ports:

80
443
1935

⚡ Important:
Use a wildcard * in both subdomain levels, meaning connections must be allowed for all variations like:

python

abc.def.cloud.wowza.com

Step 2: Adjust Corporate Network or Proxy Settings

If your application is running on a corporate or restricted network:

Ask the IT or Security team to whitelist *.cloud.wowza.com on ports 80, 443, and 1935.
Make sure SSL Inspection or Deep Packet Inspection isn’t tampering with WebSocket traffic.
These security measures can break WebSocket handshake processes, leading to failed connections.

Step 3: Review Browser and Client Settings

Sometimes, the browser can block WebRTC/WebSocket traffic unintentionally.

Use modern browsers like Chrome, Firefox, or Edge (latest versions).
Disable browser extensions like:
- Privacy blockers
- WebRTC leak preventers
- Strict ad blockers

These tools might interfere with WebRTC or WebSocket operations.

How can You Test if the Connections are Working?

Testing is critical to confirm that your changes are effective.

Use Online Tools

WebSocket Test:
Check WebSocket connectivity via:
WebSocket.org Echo Test

Port Checking Tool:
Run a telnet command in the terminal to check if a port is open:

bash

telnet abc.def.cloud.wowza.com 1935

Curl Command for HTTPS:

bash

curl -Iv https://abc.def.cloud.wowza.com

A successful response indicates that the required ports are accessible and SSL/TLS certificates are valid.

Final Tips for Smooth WebRTC and WebSocket Connections

✅ Always ensure your firewall and proxies are properly configured for outbound traffic.

✅ Make sure your security appliances aren’t blocking or inspecting SSL/WebSocket traffic too aggressively.

✅ Keep your browsers updated and free from conflicting extensions.

✅ Regularly monitor connectivity using online tools and terminal commands.

Proper setup leads to seamless real-time communication and uninterrupted media streaming using Wowza or similar platforms.

About Author

Jayanti Katariya is the CEO of Moon Technolabs, a fast-growing IT solutions provider, with 18+ years of experience in the industry. Passionate about developing creative apps from a young age, he pursued an engineering degree to further this interest. Under his leadership, Moon Technolabs has helped numerous brands establish their online presence and he has also launched an invoicing software that assists businesses to streamline their financial operations.