Well-known · Linux/Unix

514 Syslog / RSH

TCP No
UDP Yes
SCTP
DCCP

What it is

UDP/514 is Syslog system logging; TCP/514 was the legacy Remote Shell (rsh).

When / why

Central log collection (UDP/514). rsh is insecure — disabled in favour of SSH.

Protocol status detail

TransportStatusMeaning
TCP No Not assigned, standardized, or widely used on this port.
UDP Yes Assigned by IANA and standardized, specified, or widely used on this port.
SCTP Not applicable for this transport.
DCCP Not applicable for this transport.

Port range

Well-known (0–1023). System port for a core service. On Unix-like systems, binding it requires superuser privileges.

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