Port 2049 supports NFS and nfs (SCTP reference coverage) across distinct transports. Review each protocol before writing firewall or monitoring policy.
Network File System server traffic; current NFS versions commonly use TCP.
Unix/Linux shared storage, virtualisation datastores, and container persistent storage.
Client to server
Keep on trusted storage networks, use NFSv4 security controls, constrain exports, and avoid public exposure.
nfs (SCTP reference coverage) is documented as a network service convention for port 2049 over SCTP.
Use this reference entry when identifying or validating systems documented to use 2049/SCTP.
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.