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// Other services

Port 4418: AXYS communication protocol

Port 4418 is assigned by IANA to axysbridge (AXYS communication protocol).

4418

How axysbridge works

Other services
client:4418axysbridgeresponse client:4418axysbridgeresponse

The client sends a request to port 4418 and the axysbridge service answers.

Transport
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 4418 dangerous?

We have no specific security note for port 4418. 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 4418

ServicePortTransportDescriptionReferenceUpdated
axysbridge 4418 UDP AXYS communication protocol - 2016-03-14
-4418-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 4418, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4418'      # process listening on 4418
sudo lsof -nP -i :4418

macOS

sudo lsof -nP -i :4418

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4418 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4418
netstat -ano | findstr :4418

From another machine

nmap -p 4418 -sV <host>
sudo nmap -sU -p 4418 <host>
nc -zv <host> 4418

Block it in the firewall

sudo ufw deny 4418/udp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4418" -Direction Inbound -LocalPort 4418 -Protocol UDP -Action Block  # Windows
04 FAQ
What is port 4418 used for?

Port 4418 is assigned by IANA to axysbridge (AXYS communication protocol).

Is port 4418 TCP or UDP?

Port 4418 is registered for UDP.

Is it safe to open port 4418?

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 4418 is open?

On Linux run "ss -ltnup 'sport = :4418'", on macOS "lsof -nP -i :4418", and on Windows "netstat -ano | findstr :4418" to see the local process. From another machine, "nmap -p 4418 <host>" shows whether it is reachable.

05 Related
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