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// Other services

Port 2245: HaO

Port 2245 is assigned by IANA to hao (HaO).

2245

How hao works

Other services
client:2245haoresponse client:2245haoresponse

The client sends a request to port 2245 and the hao 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 2245 dangerous?

We have no specific security note for port 2245. 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 2245

ServicePortTransportDescriptionReferenceUpdated
hao 2245 TCP, UDP HaO - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2245, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2245'      # process listening on 2245
sudo lsof -nP -i :2245

macOS

sudo lsof -nP -i :2245

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2245 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2245
netstat -ano | findstr :2245

From another machine

nmap -p 2245 -sV <host>
sudo nmap -sU -p 2245 <host>
nc -zv <host> 2245

Block it in the firewall

sudo ufw deny 2245/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2245" -Direction Inbound -LocalPort 2245 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2245 used for?

Port 2245 is assigned by IANA to hao (HaO).

Is port 2245 TCP or UDP?

Port 2245 is registered for TCP and UDP.

Is it safe to open port 2245?

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 2245 is open?

On Linux run "ss -ltnup 'sport = :2245'", on macOS "lsof -nP -i :2245", and on Windows "netstat -ano | findstr :2245" to see the local process. From another machine, "nmap -p 2245 <host>" shows whether it is reachable.

05 Related
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