Introduction

Enterprises with high-security requirements usually have firewalls that restrict employees from visiting unauthorized sites to protect internal information.

To ensure that enterprise users can connect to Agora's services through a firewall, Agora supports setting up a cloud proxy.

Compared with setting a single proxy server, the cloud proxy is more flexible and stable, thus widely implemented in organizations with high-security requirements, such as large-scale enterprises, hospitals, universities, and banks.

Working principles

The following diagram shows the working principles of the Agora cloud proxy.

1. Before connecting to Agora SD-RTN, the Agora SDK sends the request to the cloud proxy.
2. The cloud proxy sends back the proxy information.
3. The Agora SDK sends the data to the cloud proxy, and the cloud proxy forwards the data to Agora SD-RTN.
4. Agora SD-RTN sends the data to the cloud proxy, and the cloud proxy forwards the data to the Agora SDK.

Implementation

Agora Web SDK v2.5.1 or later supports the cloud proxy.

1. Download the latest version of the Agora Web SDK.

2. Prepare the development environment. For details, see Start a Call or Start Live Interactive Streaming.

3. Contact support@agora.io and provide your App ID, and the information on the regions using the cloud proxy, the concurrent scale, and network operators.

4. Add the following test IP addresses and ports to your whitelist.

   The sources are the clients that integrate the Agora Web SDK.

   Protocol	Destination	Port	Purpose
   TCP	23.236.115.138	443, 4000 3433 - 3460	Message data transmission Media data exchange
   TCP	69.28.51.149	443, 4000 3433 - 3460	Message data transmission Media data exchange
   TCP	164.52.87.25	443, 4000 3433 - 3460	Message data transmission Media data exchange
   TCP	47.74.211.17	443	Edge node communication
   TCP	52.80.192.229	443	Edge node communication
   TCP	52.52.84.170	443	Edge node communication
   TCP	47.96.234.219	443	Edge node communication
   UDP	23.236.115.138	3478 - 3500	Media data exchange
   UDP	164.52.87.25	3478 - 3500	Media data exchange
   UDP	148.153.66.218	3478 - 3500	Media data exchange

   These IPs are for testing only. You need to apply for exclusive IP resources for production environment.

5. Call the startProxyServer method to enable the cloud proxy and see if the audio/video call works.

6. Agora will provide the IP addresses (domain name) and ports for you to use the cloud proxy in the production environment. Add the IP address and ports to your whitelist.

7. If you want to disable the cloud proxy, call the stopProxyServer method.

Sample code

Enable the cloud proxy

var client = AgoraRTC.createClient({mode: 'live',codec: 'vp8'});

// Start the cloud proxy.
client.startProxyServer();
// Join a channel.
client.init(key, function() {
    client.join(channelKey, channel, null, function(uid) {
        .......
    })
})

Disable the cloud proxy

// After enabling the cloud proxy and joining the channel.
...
// Leave the channel.
client.leave();

// Disable the cloud proxy.
client.stopProxyServer();

// Join the channel.
client.join(channelKey, channel, null, function(uid) {
...
}

API reference

• startProxyServer
• stopProxyServer

Considerations

• The startProxyServer and stopProxyServer methods must be called before joining the channel or after leaving the channel.
• The Agora Web SDK also provides the setProxyServer and setTurnServer methods for you to deploy the proxy. The setProxyServer and setTurnServer methods cannot be used with the startProxyServer method at the same time, else an error occurs.
• The stopProxyServer method disables all proxy settings, including those set by the setProxyServer and setTurnServer methods.