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// Other services

Port 2473: Aker-cdp

Port 2473 is assigned by IANA to aker-cdp (Aker-cdp).

2473

How aker-cdp works

Other services
client:2473aker-cdpresponse client:2473aker-cdpresponse

The client sends a request to port 2473 and the aker-cdp 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 2473 dangerous?

We have no specific security note for port 2473. 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 2473

ServicePortTransportDescriptionReferenceUpdated
aker-cdp 2473 TCP, UDP Aker-cdp - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2473, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2473'      # process listening on 2473
sudo lsof -nP -i :2473

macOS

sudo lsof -nP -i :2473

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2473 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2473
netstat -ano | findstr :2473

From another machine

nmap -p 2473 -sV <host>
sudo nmap -sU -p 2473 <host>
nc -zv <host> 2473

Block it in the firewall

sudo ufw deny 2473/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2473" -Direction Inbound -LocalPort 2473 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2473 used for?

Port 2473 is assigned by IANA to aker-cdp (Aker-cdp).

Is port 2473 TCP or UDP?

Port 2473 is registered for TCP and UDP.

Is it safe to open port 2473?

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 2473 is open?

On Linux run "ss -ltnup 'sport = :2473'", on macOS "lsof -nP -i :2473", and on Windows "netstat -ano | findstr :2473" to see the local process. From another machine, "nmap -p 2473 <host>" shows whether it is reachable.

05 Related
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