Estoy mirando este sitio, que se supone que es una tabla para probar un servidor TURN (de acuerdo a esto esta respuesta)

plugin.temasys.com.sg/demo/samples/web/content/peerconnection/trickle-ice/index.html

Puse la información de mi servidor, pero no pude encontrar nada para determinar si el servidor funciona. La sección de candidatos de hielo se ve igual incluso si no hay un servidor elegido.

Mi servidor TURN está instalado en Amazon EC2. Seguí las instrucciones de instalación del repositorio de coturn aquí:

github.com/coturn/coturn/blob/master/INSTALL

Lo siguiente es lo que obtengo en mi servidor cuando hago el comando para iniciar el servidor TURN, desdeaquí:

RFC 3489/5389/5766/5780/6062/6156 STUN/TURN Server
Version Coturn-4.2.1.2 'Monza'
0:
Max number of open files/sockets allowed for this process: 4096
0:
Due to the open files/sockets limitation,
max supported number of TURN Sessions possible is: 2000 (approximately)
0:

==== Show him the instruments, Practical Frost: ====

0: TLS supported
0: DTLS supported
0: AEAD supported
0: Redis supported
0: PostgreSQL supported
0: MySQL supported
0: MongoDB is not supported
0: OpenSSL compile-time version 0x1000106f: fresh enough
0: Default Net Engine version: 3 (UDP thread per CPU core)

=====================================================

0: Config file found: /usr/local/etc/turnserver.conf
0: Listener address to use: 172.31.43.176
0: Relay address to use: 172.31.43.176
0: Config file found: /usr/local/etc/turnserver.conf
0: Domain name:
0: Default realm: realm
0: Config file found: /usr/local/etc/turnuserdb.conf
0: WARNING: cannot find certificate file: turn_server_cert.pem (1)
0: WARNING: cannot start TLS and DTLS listeners because certificate file is not set properly
0: WARNING: cannot find private key file: turn_server_pkey.pem (1)
0: WARNING: cannot start TLS and DTLS listeners because private key file is not set properly
0: pid file created: /var/run/turnserver.pid
0: IO method (main listener thread): epoll (with changelist)
0: WARNING: I cannot support STUN CHANGE_REQUEST functionality because only one IP address is provided
0: Wait for relay ports initialization...
0:   relay 172.31.43.176 initialization...
0:   relay 172.31.43.176 initialization done
0: Relay ports initialization done
0: IO method (general relay thread): epoll (with changelist)
0: IPv4. UDP listener opened on: 172.31.43.176:3478
0: Total UDP servers: 0
0: Total General servers: 1
0: turn server id=0 created
0: IPv4. TCP listener opened on : 172.31.43.176:3478
0: IO method (cli thread): epoll (with changelist)
0: IPv4. CLI listener opened on : 127.0.0.1:5766
0: IO method (auth thread): epoll (with changelist)

Parece estar funcionando, pero ¿cómo lo sé? Pido disculpas por mi ignorancia, he estado leyendo tantos documentos sobre esto que no puedo seguirlo todo.

EDITAR: Bueno, algo está sucediendo :)

Ahora los recibo en mi servidor de turno cada vez que uso el sitio mencionado anteriormente:

64: ERROR: check_stun_auth: Cannot find credentials of user <ubuntu>
64: session 000000000000000004: realm <realm> user <ubuntu>: incoming packet message processed, error 401: Unauthorised

EDIT 2: eliminé la parte de ubuntu y ahora recibo lo que parecen ser respuestas exitosas. Todavía no sé lo que significa, pero es un comienzo :)

274: handle_udp_packet: New UDP endpoint: local addr 172.31.43.176:3478, remote addr 12.123.123.123:64064
274: session 000000000000000007: realm <realm> user <>: incoming packet BINDING processed, success
274: handle_udp_packet: New UDP endpoint: local addr 172.31.43.176:3478, remote addr 12.123.123.123:64068
274: session 000000000000000008: realm <realm> user <>: incoming packet BINDING processed, success
274: session 000000000000000007: realm <realm> user <>: incoming packet message processed, error 401: Unauthorised
274: session 000000000000000008: realm <realm> user <>: incoming packet message processed, error 401: Unauthorised
274: IPv4. Local relay addr: 172.31.43.176:56767
274: session 000000000000000007: new, realm=<realm>, username=<turnadm>, lifetime=600
274: session 000000000000,000007: realm <realm> user <turnadm>: incoming packet ALLOCATE processed, success
274: IPv4. Local relay addr: 172.31.43.176:54363
274: session 000000000000000008: new, realm=<realm>, username=<turnadm>, lifetime=600
274: session 000000000000000008: realm <realm> user <turnadm>: incoming packet ALLOCATE processed, success
274: session 000000000000000007: realm <realm> user <turnadm>: incoming packet ALLOCATE processed, success
274: session 000000000000000008: realm <realm> user <turnadm>: incoming packet ALLOCATE processed, success