CyberHunter
Local dataset, no network
// Other services

Port 1126: HP VMM Agent

Port 1126 is assigned by IANA to hpvmmdata (HP VMM Agent).

1126

How hpvmmdata works

Other services
client:1126hpvmmdataresponse client:1126hpvmmdataresponse

The client sends a request to port 1126 and the hpvmmdata 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 1126 dangerous?

We have no specific security note for port 1126. 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 1126

ServicePortTransportDescriptionReferenceUpdated
hpvmmdata 1126 TCP, UDP HP VMM Agent - 2004-11

// source: IANA service name and port number registry

03 Check it

Which program uses port 1126, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1126'      # process listening on 1126
sudo lsof -nP -i :1126

macOS

sudo lsof -nP -i :1126

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1126 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1126
netstat -ano | findstr :1126

From another machine

nmap -p 1126 -sV <host>
sudo nmap -sU -p 1126 <host>
nc -zv <host> 1126

Block it in the firewall

sudo ufw deny 1126/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1126" -Direction Inbound -LocalPort 1126 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1126 used for?

Port 1126 is assigned by IANA to hpvmmdata (HP VMM Agent).

Is port 1126 TCP or UDP?

Port 1126 is registered for TCP and UDP.

Is it safe to open port 1126?

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 1126 is open?

On Linux run "ss -ltnup 'sport = :1126'", on macOS "lsof -nP -i :1126", and on Windows "netstat -ano | findstr :1126" to see the local process. From another machine, "nmap -p 1126 <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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