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// Other services

Port 2640: Alcorn McBride Inc protocol used for device control

Port 2640 is assigned by IANA to ami-control (Alcorn McBride Inc protocol used for device control).

2640

How ami-control works

Other services
client:2640ami-controlresponse client:2640ami-controlresponse

The client sends a request to port 2640 and the ami-control 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 2640 dangerous?

We have no specific security note for port 2640. 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 2640

ServicePortTransportDescriptionReferenceUpdated
ami-control 2640 TCP, UDP Alcorn McBride Inc protocol used for device control - 2020-03-12

// source: IANA service name and port number registry

03 Check it

Which program uses port 2640, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2640'      # process listening on 2640
sudo lsof -nP -i :2640

macOS

sudo lsof -nP -i :2640

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2640 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2640
netstat -ano | findstr :2640

From another machine

nmap -p 2640 -sV <host>
sudo nmap -sU -p 2640 <host>
nc -zv <host> 2640

Block it in the firewall

sudo ufw deny 2640/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2640" -Direction Inbound -LocalPort 2640 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2640 used for?

Port 2640 is assigned by IANA to ami-control (Alcorn McBride Inc protocol used for device control).

Is port 2640 TCP or UDP?

Port 2640 is registered for TCP and UDP.

Is it safe to open port 2640?

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 2640 is open?

On Linux run "ss -ltnup 'sport = :2640'", on macOS "lsof -nP -i :2640", and on Windows "netstat -ano | findstr :2640" to see the local process. From another machine, "nmap -p 2640 <host>" shows whether it is reachable.

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