CyberHunter
Local dataset, no network
// Other services

Port 9950: APC 9950

Port 9950 is assigned by IANA to apc-9950 (APC 9950).

9950

How apc-9950 works

Other services
client:9950apc-9950response client:9950apc-9950response

The client sends a request to port 9950 and the apc-9950 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 9950 dangerous?

We have no specific security note for port 9950. 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 9950

ServicePortTransportDescriptionReferenceUpdated
apc-9950 9950 TCP, UDP APC 9950 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 9950, and is it reachable?

Linux

sudo ss -ltnup 'sport = :9950'      # process listening on 9950
sudo lsof -nP -i :9950

macOS

sudo lsof -nP -i :9950

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 9950 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 9950
netstat -ano | findstr :9950

From another machine

nmap -p 9950 -sV <host>
sudo nmap -sU -p 9950 <host>
nc -zv <host> 9950

Block it in the firewall

sudo ufw deny 9950/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 9950" -Direction Inbound -LocalPort 9950 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 9950 used for?

Port 9950 is assigned by IANA to apc-9950 (APC 9950).

Is port 9950 TCP or UDP?

Port 9950 is registered for TCP and UDP.

Is it safe to open port 9950?

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 9950 is open?

On Linux run "ss -ltnup 'sport = :9950'", on macOS "lsof -nP -i :9950", and on Windows "netstat -ano | findstr :9950" to see the local process. From another machine, "nmap -p 9950 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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