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Port 1132 services

2 entries are registered on port 113. It is a well-known port (0–1023) — assignments here are IANA's, and a service found on one is usually the service that was assigned it.

entries
2

services registered on this number

transport
tcp · udp

2 transports in use

in transit
0/2

entries encrypted on the wire

worst risk
4/10

2 of 2 iana-registered

Services on this port

ranked by lookups
portservicerisk
:113Identification Protocolcaution
:113Identcaution

01Identification Protocoltcp · udp · iana-registered · risk 4/10

Port 113 was historically used for the Identification Protocol (Ident), a service that identifies the user of a particular TCP connection. This service allowed remote servers to query a client system to determine which user initiated a connection request, facilitating logging and access controls. While once commonly enabled on servers and network devices, Ident's use has declined substantially due to privacy concerns, inherent security risks, and the development of more secure authentication methods.

port 113 as Identification Protocol →

02Identtcp · iana-registered · risk 4/10

Ident, operating on port 113, is a protocol primarily used by Internet Relay Chat (IRC) servers to obtain the identity of a client attempting to connect. It provides simple identification by querying the connecting user’s ident daemon, which reports the username associated with a TCP connection. Although its use has declined due to security concerns and shifts to newer authentication methods, ident remains noteworthy historically in facilitating user management and access control in IRC networks.

port 113 as Ident →
filed underSecurityNetwork ServicesVoice and Chat

Which one is on your host

ask the machine, not the registry

The registry says what 113 is registered to. What is listening on it right now is decided by the host, and only the host can be asked. Each of these prints the process behind the socket.

linux
ss -ltnp | grep ':113\b'
macos
lsof -nP -iTCP:113 -sTCP:LISTEN
windows
netstat -ano | findstr :113

On Linux and Windows the process name comes back with the socket; on macOS lsof needs sudo to name a process that isn't yours. Match what it prints against the 2 entries above.

A port number is not a service. Anything may listen on 113 — what you actually met is decided by the host, not the registry. If a service is missing here, it belongs in the registry.

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