CyberHunter
Local dataset, no network
// Other services

Port 9086: Vesa Net2Display

Port 9086 is assigned by IANA to net2display (Vesa Net2Display).

9086

How net2display works

Other services
client:9086net2displayresponse client:9086net2displayresponse

The client sends a request to port 9086 and the net2display 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 9086 dangerous?

We have no specific security note for port 9086. 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 9086

ServicePortTransportDescriptionReferenceUpdated
net2display 9086 TCP, UDP Vesa Net2Display - 2008-01-07

// source: IANA service name and port number registry

03 Check it

Which program uses port 9086, and is it reachable?

Linux

sudo ss -ltnup 'sport = :9086'      # process listening on 9086
sudo lsof -nP -i :9086

macOS

sudo lsof -nP -i :9086

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 9086 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 9086
netstat -ano | findstr :9086

From another machine

nmap -p 9086 -sV <host>
sudo nmap -sU -p 9086 <host>
nc -zv <host> 9086

Block it in the firewall

sudo ufw deny 9086/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 9086" -Direction Inbound -LocalPort 9086 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 9086 used for?

Port 9086 is assigned by IANA to net2display (Vesa Net2Display).

Is port 9086 TCP or UDP?

Port 9086 is registered for TCP and UDP.

Is it safe to open port 9086?

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 9086 is open?

On Linux run "ss -ltnup 'sport = :9086'", on macOS "lsof -nP -i :9086", and on Windows "netstat -ano | findstr :9086" to see the local process. From another machine, "nmap -p 9086 <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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