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// Other services

Port 9450: Sentinel Keys Server

Port 9450 is assigned by IANA to sntlkeyssrvr (Sentinel Keys Server).

9450

How sntlkeyssrvr works

Other services
client:9450sntlkeyssrvrresponse client:9450sntlkeyssrvrresponse

The client sends a request to port 9450 and the sntlkeyssrvr 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 9450 dangerous?

We have no specific security note for port 9450. 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 9450

ServicePortTransportDescriptionReferenceUpdated
sntlkeyssrvr 9450 TCP, UDP Sentinel Keys Server - 2008-08-21

// source: IANA service name and port number registry

03 Check it

Which program uses port 9450, and is it reachable?

Linux

sudo ss -ltnup 'sport = :9450'      # process listening on 9450
sudo lsof -nP -i :9450

macOS

sudo lsof -nP -i :9450

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 9450 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 9450
netstat -ano | findstr :9450

From another machine

nmap -p 9450 -sV <host>
sudo nmap -sU -p 9450 <host>
nc -zv <host> 9450

Block it in the firewall

sudo ufw deny 9450/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 9450" -Direction Inbound -LocalPort 9450 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 9450 used for?

Port 9450 is assigned by IANA to sntlkeyssrvr (Sentinel Keys Server).

Is port 9450 TCP or UDP?

Port 9450 is registered for TCP and UDP.

Is it safe to open port 9450?

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 9450 is open?

On Linux run "ss -ltnup 'sport = :9450'", on macOS "lsof -nP -i :9450", and on Windows "netstat -ano | findstr :9450" to see the local process. From another machine, "nmap -p 9450 <host>" shows whether it is reachable.

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