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// Other services

Port 2518: Willy

Port 2518 is assigned by IANA to willy (Willy).

2518

How willy works

Other services
client:2518willyresponse client:2518willyresponse

The client sends a request to port 2518 and the willy 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 2518 dangerous?

We have no specific security note for port 2518. 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 2518

ServicePortTransportDescriptionReferenceUpdated
willy 2518 TCP, UDP Willy - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2518, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2518'      # process listening on 2518
sudo lsof -nP -i :2518

macOS

sudo lsof -nP -i :2518

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2518 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2518
netstat -ano | findstr :2518

From another machine

nmap -p 2518 -sV <host>
sudo nmap -sU -p 2518 <host>
nc -zv <host> 2518

Block it in the firewall

sudo ufw deny 2518/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2518" -Direction Inbound -LocalPort 2518 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2518 used for?

Port 2518 is assigned by IANA to willy (Willy).

Is port 2518 TCP or UDP?

Port 2518 is registered for TCP and UDP.

Is it safe to open port 2518?

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 2518 is open?

On Linux run "ss -ltnup 'sport = :2518'", on macOS "lsof -nP -i :2518", and on Windows "netstat -ano | findstr :2518" to see the local process. From another machine, "nmap -p 2518 <host>" shows whether it is reachable.

05 Related
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