Slyber TURN Server Settings

1. Top Global Telemetry Bar

• Active pairs: total number of peer pair cards created in the current session.
• Relay sessions: total number of active relay connections that have successfully completed ICE candidate negotiation; each active pair yields two relay sessions.
• Total throughput: aggregate incoming bitrate of all active video calls in kilobits or megabits per second.
• Relayed traffic: total volume of media data in megabytes that has passed through the TURN server under test since the pairs were launched.

2. Turn server configuration Block

• Ice transport policy: by default, the forced relay mode is selected, which disables direct P2P connections and guarantees that the entire media stream routes strictly through the TURN server.
• Verify server connection: the button in the upper-right corner of the panel sends a STUN Binding test packet to the specified address, checks key storage availability, and displays the exact server response time in milliseconds.

3. Configuring Authorization Modes

• Credential provisioning: selects the method for generating the temporary HMAC-SHA1 password—local calculation by the inspector itself using a shared key, or an HTTP request to the TURN server's own /api/turn-credentials endpoint.
• Shared secret key: secret passphrase that must match the TURN_SECRET variable on the server side.
• Turn http api url: address of the TURN server's internal HTTP API for remote credential retrieval.

• Redis address or url: network address of the Redis server in host and port format or a full connection string.
• Redis acl username: username for Redis 6+ Access Control Lists (ACL), if used.
• Redis password: password for authorization in the Redis database.
• Redis db index: numeric database index, defaults to 0.

4. Media pool & pair generator Block

• Upload video files: upload custom video clips from your computer. All selected files are automatically saved in the browser's built-in IndexedDB database, so there is no need to re-upload them after refreshing the page.
• Add 4 demo streams: instantly creates four synthetic streams with animated Canvas graphics and audio tone generators ranging from 220 to 520 Hz for testing without local files.
• Clear pool: removes all video clips from the pool and clears browser storage.
• Pairs to spawn and Spawn pairs: simultaneously launches a specified number of call pairs from 1 to 50; for each pair, the algorithm randomly selects two different video clips from the pool so that peers transmit distinct streams to each other.
• +1 pair: quickly adds one more pair to the already running connections.
• Mute all and Terminate all: globally mutes audio across all video players or completely terminates all active sessions.

5. Pair Card and Live Connection Diagnostics

• Pair session status: a colored badge next to the pair number shows the current state—yellow during port allocation or session restart, green during active video and audio transmission, and red if the connection drops.
• Peer relay address: in the upper-right corner of each participant, a green badge displays the actual external IP address of the TURN server and the allocated relay UDP port, for example, relay 89.111.175.67:49213 for the first peer and relay 89.111.175.67:49212 for the second.
• Media stream routing: above each player, the name of the outgoing file is shown in the Sending to peer line and the name of the incoming video stream is shown in the Receiving on screen from peer line, allowing you to visually verify that channels are not mixed up.
• Live peer telemetry: on the right above the player, the current stream bitrate in kilobits per second, volume of received data in megabytes, and round-trip time (RTT) in milliseconds update every second.

• Unmute peer audio / Mute peer audio: enables or disables listening to the incoming audio track of a specific participant via the Web Audio API.
• Ice restart: triggers the candidate renegotiation procedure pc.createOffer({ iceRestart: true }) without dropping the call. When clicked, the status briefly changes to a yellow session restart indicator, the server allocates a new pair of relay UDP ports, and the stream seamlessly switches to the new route.
• Revoke redis key: displayed when operating in redis mode, this button allows you to delete a specific participant's key from the Redis database with a single click to test how the server and client respond to access revocation.
• Remove pair: cleanly closes both WebRTC connections, stops media stream capture, closes signaling sockets, and removes the pair card from the screen.