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// Other services

Port 219: Unisys ARPs

Port 219 is assigned by IANA to uarps (Unisys ARPs).

219

How uarps works

Other services
client:219uarpsresponse client:219uarpsresponse

The client sends a request to port 219 and the uarps 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 219 dangerous?

We have no specific security note for port 219. 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 219

ServicePortTransportDescriptionReferenceUpdated
uarps 219 TCP, UDP Unisys ARPs - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 219, and is it reachable?

Linux

sudo ss -ltnup 'sport = :219'      # process listening on 219
sudo lsof -nP -i :219

macOS

sudo lsof -nP -i :219

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 219 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 219
netstat -ano | findstr :219

From another machine

nmap -p 219 -sV <host>
sudo nmap -sU -p 219 <host>
nc -zv <host> 219

Block it in the firewall

sudo ufw deny 219/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 219" -Direction Inbound -LocalPort 219 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 219 used for?

Port 219 is assigned by IANA to uarps (Unisys ARPs).

Is port 219 TCP or UDP?

Port 219 is registered for TCP and UDP.

Is it safe to open port 219?

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 219 is open?

On Linux run "ss -ltnup 'sport = :219'", on macOS "lsof -nP -i :219", and on Windows "netstat -ano | findstr :219" to see the local process. From another machine, "nmap -p 219 <host>" shows whether it is reachable.

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