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// Other services

Port 1281: healthd

Port 1281 is assigned by IANA to healthd (healthd).

1281

How healthd works

Other services
client:1281healthdresponse client:1281healthdresponse

The client sends a request to port 1281 and the healthd 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 1281 dangerous?

We have no specific security note for port 1281. 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 1281

ServicePortTransportDescriptionReferenceUpdated
healthd 1281 TCP, UDP healthd - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1281, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1281'      # process listening on 1281
sudo lsof -nP -i :1281

macOS

sudo lsof -nP -i :1281

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1281 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1281
netstat -ano | findstr :1281

From another machine

nmap -p 1281 -sV <host>
sudo nmap -sU -p 1281 <host>
nc -zv <host> 1281

Block it in the firewall

sudo ufw deny 1281/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1281" -Direction Inbound -LocalPort 1281 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1281 used for?

Port 1281 is assigned by IANA to healthd (healthd).

Is port 1281 TCP or UDP?

Port 1281 is registered for TCP and UDP.

Is it safe to open port 1281?

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 1281 is open?

On Linux run "ss -ltnup 'sport = :1281'", on macOS "lsof -nP -i :1281", and on Windows "netstat -ano | findstr :1281" to see the local process. From another machine, "nmap -p 1281 <host>" shows whether it is reachable.

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