DDoS Protection Setup ​

TCP Shield, Ngrok, or NeoProtect — is the TCP Proxy you use to protect your main server. It only supports the TCP protocol.

Plasmo Voice can't work on the TCP protocol.

And there is no properer "DDoS protection proxy as a service" for the UDP protocol used by Plasmo Voice.

That's why you need to make your own UDP Proxy.

Rent a Node ​

You need to rent a Virtual or a Dedicated Node with good UDP protection.

OVHcloud is a solid choice. You can get a VPS with good protection for like 7$.

We'll call this a UDP Proxy Node.

Set up the UDP Proxy Node ​

Install Nginx ​

Nginx is the software we will use to forward traffic from the UDP Proxy to a Voice Server.

Use this guide to install it:

https://www.digitalocean.com/community/tutorials/how-to-install-nginx-on-ubuntu-22-04

(Or use Google if you don't use Ubuntu)

Edit Nginx config ​

Lets we have a Main Node: 111.1.111.111 and UDP Proxy Node: 222.2.222.222

Main Node is running a Server with Plasmo Voice configured like this:

[host]
ip = "111.1.111.111" # Same as 0.0.0.0
port = 1000 # Same as 0 if 1000 is the port of the Game Server

In the main config of Nginx nginx.conf you need to add these lines:

stream {
  server {
    listen 2000 udp; # You can use any port. You will need this later. 
    proxy_pass 111.1.111.111:1000; # IP of the Voice Chat server on the Main Node
  }
  server {
    # If you need to add more servers
  }
}

Now the UDP Proxy Node will forward all traffic it receives on UDP port 2000 UDP to the proxy_pass IP: 111.1.111.111:1000.

Edit Plasmo Voice Config ​

Next, we need to make it so that players will connect to the UDP Proxy Node instead of connecting directly to the Voice Server.

You can do it by changing the Plasmo Voice config on the Main Node.

[host]
ip = "111.1.111.111" # Same as 0.0.0.0
port = 1000 # Same as 0 if 1000 is the port of the Game Server

[host.public]
ip = "222.2.222.222" # UDP Proxy Node IP
port = 2000 # `listen` port

And that's it. Configure your Main Node firewall so that it only allows UDP traffic from the UDP Proxy Node and the voice chat will work.

Troubleshooting ​

There is a rare problem when the proxy only works periodically.

Adding this to a server block may help.

stream {
  server {
    # ...
    proxy_timeout 15s;
  }
}