Network Settings

Configure all network communication in Menu → Settings → Communication.

Ports

Service	Protocol	Default Port	Notes
Web UI / Remote control	HTTP	8123	Built-in Exaplay web service
Project updates	WS	8123	Live project events
Performance updates	WS	8123	Live diagnostics data
Instance Discovery	UDP broadcast	45454	Auto-discovery of other Exaplay instances
Client Heartbeat	UDP broadcast	45455	Multi-client liveness — a master learns its clients' addresses here
TCP Command Server	TCP	8100	Configurable; see TCP Listen
UDP Command Server	UDP	8200	Configurable; see UDP Listen
OSC Receive	UDP	8000	Configurable
OSC Send	UDP	—	Destination configured per use
ArtNet	UDP	6454	Standard ArtNet port — DMX out from Data Tracks; DMX in when Art-Net Input is enabled, timecode in when Timecode Mode is Art-Net (configurable)
sACN (E1.31)	UDP	5568	DMX in when sACN (E1.31) Input is enabled — multicast 239.255.x.x per mapped universe, or unicast (configurable)
NDI Discovery	mDNS	5353	Requires multicast

OSC Settings

Receive

OSC receive is always active — there is no enable switch. The engine listens on the address and port configured in OSC Listen (default *:8000, i.e. all interfaces on port 8000); clear the field to disable OSC input.

Every command addresses a composition as /<prefix>/<composition>/<command>:

• <prefix> is set by OSC Prefix (default exaplay).
• <composition> is the composition's ID (comp1, comp2, …) or its name — case-insensitive, with _ standing in for spaces (an OSC address cannot contain them): /exaplay/Main_Screen/play starts the composition named "Main Screen". The composition's Inspector shows a ready-to-copy address in its Show Control section.
• <command> is play, pause, stop, cue, … — the full verb list with worked console examples is in the Show Control workflow.

Send

OSC Clients takes one host:port destination per line. The engine streams playback telemetry to every listed client:

Address	Content
/<prefix>/<composition>/cueindex, /cueframe, /cuetime, /cueduration, /status	Per-composition playback state (also the stream multiclient render nodes follow)
/<prefix>/global/show	The loaded show's file name
/timecode (configurable)	OSC timecode when Timecode Mode is Master (see Timecode Sync)

Cue scripts can additionally send one-shot OSC messages to any destination — see Show Control.

TCP Settings

The TCP Command Server accepts plain-text comma-delimited commands over a persistent TCP connection. It is designed for show control systems, touch panels, and other devices that cannot easily send HTTP or OSC.

Setting	Description
TCP Listen	Address and port to listen on, one entry per line (e.g. *:8100 to listen on all interfaces on port 8100)

Leave the field empty to disable TCP control.

Use this for external show-control systems that send plain-text commands over a persistent connection.

UDP Settings

The UDP Command Server accepts the same comma-delimited commands as the TCP server, but over UDP datagrams. Each command arrives as a single datagram; the engine sends the complete response back to the sender as a single reply datagram.

Setting	Description
UDP Listen	Address and port to listen on, one entry per line (e.g. *:8200 to listen on all interfaces on port 8200)

Leave the field empty to disable UDP control.

Use this for simple one-shot commands sent as individual UDP packets.

ArtNet Settings

Setting	Description
Art-Net Input	Opens the Art-Net listening socket so a lighting console can drive playback over DMX. Off by default — nothing is opened while it is off. Takes effect on save, no restart.
Art-Net Port	UDP port to listen on, 6454 by default. Change it only when another Art-Net node runs on the same machine. Also the port Art-Net Timecode mode listens on.
sACN (E1.31) Input	Opens the sACN listening socket for DMX from an E1.31 console. Off by default. Exaplay joins the multicast group of every universe an sACN mapping names; unicast works too.
sACN Port	UDP port to listen on, 5568 by default (the E1.31 standard port).

The channel-to-action mappings are edited in the table under these rows and are stored in the show, not in this machine's configuration — see DMX input.

ArtNet timecode (OpTimeCode) as a sync source is enabled under Settings → Timecode → Timecode Mode → Art-Net Timecode (slave), not here; that mode opens the Art-Net port by itself (see Timecode Sync).

Remote Access

The web UI is served from the engine's HTTP server and accessible from any browser on the local network at http://<engine-ip>:8123/.

Security note: There is no built-in authentication. Restrict access using your network firewall or a VPN. Do not expose port 8123 to the public internet.

Firewall Configuration

Open the following inbound rules on the Exaplay machine's Windows Firewall:

TCP  8123     Exaplay Web UI & API
UDP  45454    Instance Discovery (auto-discovery of other Exaplay instances)
UDP  45455    Client Heartbeat (multi-client; without it the master never
              drives its clients' playback)
TCP  8100     TCP Command Server
UDP  8200     UDP Command Server
UDP  8000     OSC Receive
UDP  5353     NDI Discovery (mDNS)
TCP  5960+    NDI Data

Art-Net (UDP)

Data Tracks send DMX to lighting fixtures from a sending socket, configured per track (destination address and port 6454 by default) — no inbound rule is needed for that. With Art-Net Input enabled (Settings → Communication) or Timecode Mode set to Art-Net, Exaplay also listens on UDP 6454 (or the configured port); with sACN (E1.31) Input enabled it listens on UDP 5568. Add inbound rules for the ones you use:

UDP  6454     Art-Net DMX / timecode input (Art-Net Input or Art-Net Timecode mode)
UDP  5568     sACN (E1.31) DMX input (only when sACN Input is enabled)

TCP, UDP and OSC remain the command ports for other show-control gear (see Art-Net & DMX).