CyberHunter
Local dataset, no network
// Other services

Port 9997: Palace-6

Port 9997 is assigned by IANA to palace-6 (Palace-6).

9997

How palace-6 works

Other services
client:9997palace-6response client:9997palace-6response

The client sends a request to port 9997 and the palace-6 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 9997 dangerous?

We have no specific security note for port 9997. 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 9997

ServicePortTransportDescriptionReferenceUpdated
palace-6 9997 TCP, UDP Palace-6 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 9997, and is it reachable?

Linux

sudo ss -ltnup 'sport = :9997'      # process listening on 9997
sudo lsof -nP -i :9997

macOS

sudo lsof -nP -i :9997

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 9997 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 9997
netstat -ano | findstr :9997

From another machine

nmap -p 9997 -sV <host>
sudo nmap -sU -p 9997 <host>
nc -zv <host> 9997

Block it in the firewall

sudo ufw deny 9997/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 9997" -Direction Inbound -LocalPort 9997 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 9997 used for?

Port 9997 is assigned by IANA to palace-6 (Palace-6).

Is port 9997 TCP or UDP?

Port 9997 is registered for TCP and UDP.

Is it safe to open port 9997?

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 9997 is open?

On Linux run "ss -ltnup 'sport = :9997'", on macOS "lsof -nP -i :9997", and on Windows "netstat -ano | findstr :9997" to see the local process. From another machine, "nmap -p 9997 <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

Latest vulnerability news

All news