Port 22 supports SSH and ssh (UDP/SCTP reference coverage) across distinct transports. Review each protocol before writing firewall or monitoring policy.
Encrypted remote shell, command execution and file transfer.
Linux administration, automation, tunnels, SFTP/SCP and Git access.
Client to server
Disable password authentication where practical, protect private keys and restrict administrative access by source network.
ssh (UDP/SCTP reference coverage) is documented as a network service convention for port 22 over UDP + SCTP.
Use this reference entry when identifying or validating systems documented to use 22/UDP + 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.