CyberHunter
Local dataset, no network
// Other services

Port 9285: N2H2 Filter Service Port

Port 9285 is assigned by IANA to n2h2server (N2H2 Filter Service Port).

9285

How n2h2server works

Other services
client:9285n2h2serverresponse client:9285n2h2serverresponse

The client sends a request to port 9285 and the n2h2server 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 9285 dangerous?

We have no specific security note for port 9285. 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 9285

ServicePortTransportDescriptionReferenceUpdated
n2h2server 9285 TCP, UDP N2H2 Filter Service Port - 2002-02

// source: IANA service name and port number registry

03 Check it

Which program uses port 9285, and is it reachable?

Linux

sudo ss -ltnup 'sport = :9285'      # process listening on 9285
sudo lsof -nP -i :9285

macOS

sudo lsof -nP -i :9285

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 9285 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 9285
netstat -ano | findstr :9285

From another machine

nmap -p 9285 -sV <host>
sudo nmap -sU -p 9285 <host>
nc -zv <host> 9285

Block it in the firewall

sudo ufw deny 9285/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 9285" -Direction Inbound -LocalPort 9285 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 9285 used for?

Port 9285 is assigned by IANA to n2h2server (N2H2 Filter Service Port).

Is port 9285 TCP or UDP?

Port 9285 is registered for TCP and UDP.

Is it safe to open port 9285?

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 9285 is open?

On Linux run "ss -ltnup 'sport = :9285'", on macOS "lsof -nP -i :9285", and on Windows "netstat -ano | findstr :9285" to see the local process. From another machine, "nmap -p 9285 <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