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// Other services

Port 6418: SYserver remote commands

Port 6418 is assigned by IANA to syserverremote (SYserver remote commands).

6418

How syserverremote works

Other services
client:6418syserverremoteresponse client:6418syserverremoteresponse

The client sends a request to port 6418 and the syserverremote service answers.

Transport
TCP
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 6418 dangerous?

We have no specific security note for port 6418. 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 6418

ServicePortTransportDescriptionReferenceUpdated
syserverremote 6418 TCP SYserver remote commands - 2010-03-23
-6418-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 6418, and is it reachable?

Linux

sudo ss -ltnup 'sport = :6418'      # process listening on 6418
sudo lsof -nP -i :6418

macOS

sudo lsof -nP -i :6418

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6418 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 6418
netstat -ano | findstr :6418

From another machine

nmap -p 6418 -sV <host>
nc -zv <host> 6418

Block it in the firewall

sudo ufw deny 6418/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 6418" -Direction Inbound -LocalPort 6418 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 6418 used for?

Port 6418 is assigned by IANA to syserverremote (SYserver remote commands).

Is port 6418 TCP or UDP?

Port 6418 is registered for TCP.

Is it safe to open port 6418?

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 6418 is open?

On Linux run "ss -ltnup 'sport = :6418'", on macOS "lsof -nP -i :6418", and on Windows "netstat -ano | findstr :6418" to see the local process. From another machine, "nmap -p 6418 <host>" shows whether it is reachable.

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