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Port 6532 services

2 entries are registered on port 653. 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
:653SupportSoft Nexus Remote Commandcaution
:653RepCmdsafe

01SupportSoft Nexus Remote Commandtcp · udp · iana-registered · risk 4/10

Port 653 is commonly associated with SupportSoft's Nexus Remote Command, which facilitates remote management and diagnostic functions through proxy gateway mechanisms. This port supports both TCP and UDP protocols, enabling flexible communication between remote administration clients and managed systems. Although primarily legacy software, it enables centralized support by routing remote control traffic efficiently.

port 653 as SupportSoft Nexus Remote Command →
filed underRemote AccessNetwork Services

Which one is on your host

ask the machine, not the registry

The registry says what 653 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 ':653\b'
macos
lsof -nP -iTCP:653 -sTCP:LISTEN
windows
netstat -ano | findstr :653

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 653 — 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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