CyberHunter
Local dataset, no network
// Other services

Port 459: ampr-rcmd

Port 459 is assigned by IANA to ampr-rcmd (ampr-rcmd).

459

How ampr-rcmd works

Other services
client:459ampr-rcmdresponse client:459ampr-rcmdresponse

The client sends a request to port 459 and the ampr-rcmd 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 459 dangerous?

We have no specific security note for port 459. 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 459

ServicePortTransportDescriptionReferenceUpdated
ampr-rcmd 459 TCP, UDP ampr-rcmd - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 459, and is it reachable?

Linux

sudo ss -ltnup 'sport = :459'      # process listening on 459
sudo lsof -nP -i :459

macOS

sudo lsof -nP -i :459

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 459 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 459
netstat -ano | findstr :459

From another machine

nmap -p 459 -sV <host>
sudo nmap -sU -p 459 <host>
nc -zv <host> 459

Block it in the firewall

sudo ufw deny 459/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 459" -Direction Inbound -LocalPort 459 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 459 used for?

Port 459 is assigned by IANA to ampr-rcmd (ampr-rcmd).

Is port 459 TCP or UDP?

Port 459 is registered for TCP and UDP.

Is it safe to open port 459?

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 459 is open?

On Linux run "ss -ltnup 'sport = :459'", on macOS "lsof -nP -i :459", and on Windows "netstat -ano | findstr :459" to see the local process. From another machine, "nmap -p 459 <host>" shows whether it is reachable.

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