root@iZwz97xd2mxg145zorrvxiZ:/usr/local/coturn/etc# cd …
root@iZwz97xd2mxg145zorrvxiZ:/usr/local/coturn# turnserver -c ./etc/turnserver.conf
0: log file opened: /var/log/turn_456036_2025-12-07.log
0: Config file found: /usr/local/coturn/./etc/turnserver.conf
0:
RFC 3489/5389/5766/5780/6062/6156 STUN/TURN Server
Version Coturn-4.5.0.8 'dan Eider’
0:
Max number of open files/sockets allowed for this process: 65535
0:
Due to the open files/sockets limitation,
max supported number of TURN Sessions possible is: 32500 (approximately)
0:

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

0: TLS supported
0: DTLS supported
0: DTLS 1.2 supported
0: TURN/STUN ALPN supported
0: Third-party authorization (oAuth) supported
0: GCM (AEAD) supported
0: OpenSSL compile-time version: OpenSSL 3.0.2 15 Mar 2022 (0x30000020)
0:
0: SQLite is not supported
0: Redis supported
0: PostgreSQL supported
0: MySQL supported
0: MongoDB is not supported
0:
0: Default Net Engine version: 3 (UDP thread per CPU core)

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

0: Domain name:
0: Default realm:
0:
CONFIGURATION ALERT: you specified long-term user accounts, (-u option)
but you did not specify the long-term credentials option
(-a or --lt-cred-mech option).
I am turning --lt-cred-mech ON for you, but double-check your configuration.
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: NO EXPLICIT LISTENER ADDRESS(ES) ARE CONFIGURED
0: ===========Discovering listener addresses: =========
0: Listener address to use: 127.0.0.1
0: Listener address to use: 172.17.3.205
0: Listener address to use: ::1
0: =====================================================
0: Total: 1 ‘real’ addresses discovered
0: =====================================================
0: NO EXPLICIT RELAY ADDRESS(ES) ARE CONFIGURED
0: ===========Discovering relay addresses: =============
0: Relay address to use: 172.17.3.205
0: Relay address to use: ::1
0: =====================================================
0: Total: 2 relay addresses discovered
0: =====================================================
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 172.17.3.205 initialization…
0: relay 172.17.3.205 initialization done