# ZeroMQ Replacement with NATS (End of Life)

## What changed

FileWave replaced ZeroMQ with NATS across FileWave 14.8 through 15.0. Current supported releases use NATS; this page preserves the migration sequence for administrators reviewing old firewall rules or upgrade history.

## Why the history still matters

ZeroMQ and NATS carried internal communication and notifications between FileWave components. During the transition, a mixed-version environment could use different messaging services on different connections. When auditing an old configuration, match each firewall rule to the FileWave versions and components that originally required it.

<p class="callout warning">The transition changed the network ports used between FileWave Server, Central, Clients, Boosters, and IVS. Use the current port article for firewall configuration instead of copying a rule set from an older release.</p>

## Historical migration sequence

- **FileWave 14.8:** NATS replaced ZeroMQ for FileWave Central-to-Server communication.
- **FileWave 14.9:** NATS replaced ZeroMQ notifications between Clients, Server, and Boosters.
- **FileWave 15.0:** ZeroMQ was removed completely.

## Related content

- [Default TCP and UDP Port Usage](https://kb.filewave.com/books/filewave-general-info/page/default-tcp-and-udp-port-usage "Default TCP and UDP Port Usage")