CyberHunter
Local dataset, no network
// Other services

Port 9213: ServerStart RemoteControl

Port 9213 is assigned by IANA to serverstart (ServerStart RemoteControl).

9213

How serverstart works

Other services
client:9213serverstartresponse client:9213serverstartresponse

The client sends a request to port 9213 and the serverstart 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 9213 dangerous?

We have no specific security note for port 9213. 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 9213

ServicePortTransportDescriptionReferenceUpdated
serverstart 9213 TCP, UDP ServerStart RemoteControl - 2009-05-15

// source: IANA service name and port number registry

03 Check it

Which program uses port 9213, and is it reachable?

Linux

sudo ss -ltnup 'sport = :9213'      # process listening on 9213
sudo lsof -nP -i :9213

macOS

sudo lsof -nP -i :9213

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 9213 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 9213
netstat -ano | findstr :9213

From another machine

nmap -p 9213 -sV <host>
sudo nmap -sU -p 9213 <host>
nc -zv <host> 9213

Block it in the firewall

sudo ufw deny 9213/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 9213" -Direction Inbound -LocalPort 9213 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 9213 used for?

Port 9213 is assigned by IANA to serverstart (ServerStart RemoteControl).

Is port 9213 TCP or UDP?

Port 9213 is registered for TCP and UDP.

Is it safe to open port 9213?

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 9213 is open?

On Linux run "ss -ltnup 'sport = :9213'", on macOS "lsof -nP -i :9213", and on Windows "netstat -ano | findstr :9213" to see the local process. From another machine, "nmap -p 9213 <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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