Configure the Open DIS module

Settings are edited in HEAT Capture’s module settings UI, under HEAT.DISModule.

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Changing UdpPort away from its default (3000) moves the listener outside the firewall scope HEAT Capture grants this module. Update the workstation’s firewall rule to match before relying on a non-default port.

Network

Setting	Type	Default	What it controls
`UdpPort`	integer	`3000`	UDP port the native receiver binds. See the warning above before changing this.
`NetworkMode`	`Broadcast` \| `Multicast`	`Broadcast`	Whether the receiver joins a multicast group or binds the port for broadcast traffic.
`NetworkGroupAddress`	string	`239.255.0.1`	Multicast group to join. Only used when `NetworkMode` is `Multicast`.
`LocalCaptureOnly`	boolean	`false`	When enabled, PDUs from any sender that is not one of the workstation’s own local IP addresses are dropped before processing.

Changing any of UdpPort, NetworkMode or NetworkGroupAddress while the module is running tears down and rebuilds the native socket in place - including reconnecting the receive loop if a session is active - without restarting the module itself.

Session trigger

Because this module runs continuously rather than being started and stopped with a capture session (see Overview), it needs its own rule for deciding when a session should start and stop from the DIS traffic it sees.

Setting	Type	Default	What it controls
`StartOnAnyPDU`	boolean	`false`	`true`: any valid PDU starts a session if one is not already running. `false`: only a PDU whose type is in `StartPduTypes` does, and only when `StartOnSpecificPDU` is also enabled.
`StartOnSpecificPDU`	boolean	`true`	Enables the `StartPduTypes` trigger. Only meaningful when `StartOnAnyPDU` is `false`.
`StartPduTypes`	set of PDU types	`{StartResume}`	Which PDU types start a session, when `StartOnSpecificPDU` is enabled.
`StopOnSpecificPDU`	boolean	`false`	Enables the `StopPduTypes` trigger. Only meaningful when `StartOnAnyPDU` is `false`.
`StopPduTypes`	set of PDU types	`{StopFreeze}`	Which PDU types stop a running session, when `StopOnSpecificPDU` is enabled.
`StopOnSilence`	boolean	`false`	Only available when `StartOnAnyPDU` is `true`. Stops a running session after `SilenceThreshold` with no PDUs received at all.
`SilenceThreshold`	duration	`10s`	How long the network can go quiet before `StopOnSilence` ends the session.

StartOnAnyPDU and the specific-PDU-type settings are mutually exclusive modes, not layered: enabling StartOnAnyPDU disables the StartPduTypes/StopPduTypes triggers entirely, and StopOnSilence only exists in the StartOnAnyPDU mode.

Host settings

This module also exposes the generic settings every HEAT Capture module has - Enabled, Interval, OverrideNodeId/NodeId, Timeout - with one specific behavior worth calling out: Enabled disables PDU processing entirely; received packets are still counted but dropped. See Manage capture modules for what each of these does generically.

HEAT Capture team. Last updated 2 October 2026.

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