Port 2377 supports Docker Swarm management and swarm (UDP reference coverage) across distinct transports. Review each protocol before writing firewall or monitoring policy.
Docker Swarm manager communication and cluster control traffic.
Workers joining a swarm and managers coordinating cluster state.
Cluster internal
Allow only between trusted swarm nodes and keep manager endpoints off untrusted networks.
swarm (UDP reference coverage) is documented as a network service convention for port 2377 over UDP.
Use this reference entry when identifying or validating systems documented to use 2377/UDP.
Varies
Confirm the listening process and current vendor documentation before permitting traffic; a listed convention does not prove the active service or its security posture.