Coturn

This folder contains the role to deploy and manage a Coturn service.

Description

Coturn is a free and open-source TURN (Traversal Using Relays around NAT) and STUN (Session Traversal Utilities for NAT) server.
It enables real-time communication (RTC) applications such as WebRTC to work reliably across NATs and firewalls.

Without TURN/STUN, video calls, conferencing, and peer-to-peer connections often fail due to NAT traversal issues.
Coturn solves this by acting as a relay server and/or discovery service for public IP addresses.

More background:

Overview

This role deploys Coturn via Docker Compose using the sys-stk-semi-stateless stack.
It automatically configures:

  • TURN and STUN listening ports

  • Relay port ranges

  • TLS certificates (via Let’s Encrypt integration)

  • Long-term credentials and/or REST API secrets

Typical use cases:

  • Nextcloud Talk

  • Jitsi

  • BigBlueButton

  • Any WebRTC-based application

Features

  • Stateless container deployment (no database or persistent volume required)

  • Automatic TLS handling via sys-stk-front-base

  • TURN and STUN support over TCP and UDP

  • Configurable relay port ranges for scaling

  • Integration into Infinito.Nexus inventory/variable system

Further Resources