CyberHunter
Local dataset, no network
// Other services

Port 9952: APC 9952

Port 9952 is assigned by IANA to apc-9952 (APC 9952).

9952

How apc-9952 works

Other services
client:9952apc-9952response client:9952apc-9952response

The client sends a request to port 9952 and the apc-9952 service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 9952 dangerous?

We have no specific security note for port 9952. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 9952

ServicePortTransportDescriptionReferenceUpdated
apc-9952 9952 TCP, UDP APC 9952 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 9952, and is it reachable?

Linux

sudo ss -ltnup 'sport = :9952'      # process listening on 9952
sudo lsof -nP -i :9952

macOS

sudo lsof -nP -i :9952

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 9952 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 9952
netstat -ano | findstr :9952

From another machine

nmap -p 9952 -sV <host>
sudo nmap -sU -p 9952 <host>
nc -zv <host> 9952

Block it in the firewall

sudo ufw deny 9952/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 9952" -Direction Inbound -LocalPort 9952 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 9952 used for?

Port 9952 is assigned by IANA to apc-9952 (APC 9952).

Is port 9952 TCP or UDP?

Port 9952 is registered for TCP and UDP.

Is it safe to open port 9952?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 9952 is open?

On Linux run "ss -ltnup 'sport = :9952'", on macOS "lsof -nP -i :9952", and on Windows "netstat -ano | findstr :9952" to see the local process. From another machine, "nmap -p 9952 <host>" shows whether it is reachable.

05 Related
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