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// Other services

Port 2206: HP OpenCall bus

Port 2206 is assigned by IANA to hpocbus (HP OpenCall bus).

2206

How hpocbus works

Other services
client:2206hpocbusresponse client:2206hpocbusresponse

The client sends a request to port 2206 and the hpocbus 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 2206 dangerous?

We have no specific security note for port 2206. 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 2206

ServicePortTransportDescriptionReferenceUpdated
hpocbus 2206 TCP, UDP HP OpenCall bus - 2005-12

// source: IANA service name and port number registry

03 Check it

Which program uses port 2206, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2206'      # process listening on 2206
sudo lsof -nP -i :2206

macOS

sudo lsof -nP -i :2206

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2206 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2206
netstat -ano | findstr :2206

From another machine

nmap -p 2206 -sV <host>
sudo nmap -sU -p 2206 <host>
nc -zv <host> 2206

Block it in the firewall

sudo ufw deny 2206/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2206" -Direction Inbound -LocalPort 2206 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2206 used for?

Port 2206 is assigned by IANA to hpocbus (HP OpenCall bus).

Is port 2206 TCP or UDP?

Port 2206 is registered for TCP and UDP.

Is it safe to open port 2206?

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 2206 is open?

On Linux run "ss -ltnup 'sport = :2206'", on macOS "lsof -nP -i :2206", and on Windows "netstat -ano | findstr :2206" to see the local process. From another machine, "nmap -p 2206 <host>" shows whether it is reachable.

05 Related
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