NAT and firewall penetration technology, TURN/STUN/ICE service establishment

Service-Terminal:

System environment: centos 7.1  

Basic environment installation:
yum install openssl
yum install openssl-devel
yum install libevent
yum install libevent-devel
g++ installation: yum install gcc-c++

Unzip turnserver-4.5.0.4.tar.gz (can be downloaded from the official website: http://turnserver.open-sys.org/downloads/)
tar -xvf turnserver-4.5.0.4.tar.gz
./configure
make
sudo make install

Create a new turn user:
ling username ling1234 password
sudo turnadmin -a -u ling -r north.gov -p ling1234

Server running: turnserver -L 183.60.237.65 -a -f -v --mobility -m 10 --user=ling:ling1234 -r north.gov

Client:

It can be written in java, js, c++, etc. Here is where js is written:

After importing the ice class library, configure it accordingly.

ice.setIceServers([{
        urls: "stun:" + uid
    }, {
        urls: "turn:" + uid + ":3478?transport=udp",
        username: "ling",
        credential: "ling1234"
    }, {
        urls: "turn:" + uid + ":3478?transport=tdp",
        username: "ling",
        credential: "ling1234"
    }]);