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// Other services

Port 2647: SyncServer

Port 2647 is assigned by IANA to syncserver (SyncServer).

2647

How syncserver works

Other services
client:2647syncserverresponse client:2647syncserverresponse

The client sends a request to port 2647 and the syncserver 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 2647 dangerous?

We have no specific security note for port 2647. 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 2647

ServicePortTransportDescriptionReferenceUpdated
syncserver 2647 TCP, UDP SyncServer - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2647, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2647'      # process listening on 2647
sudo lsof -nP -i :2647

macOS

sudo lsof -nP -i :2647

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2647 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2647
netstat -ano | findstr :2647

From another machine

nmap -p 2647 -sV <host>
sudo nmap -sU -p 2647 <host>
nc -zv <host> 2647

Block it in the firewall

sudo ufw deny 2647/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2647" -Direction Inbound -LocalPort 2647 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2647 used for?

Port 2647 is assigned by IANA to syncserver (SyncServer).

Is port 2647 TCP or UDP?

Port 2647 is registered for TCP and UDP.

Is it safe to open port 2647?

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 2647 is open?

On Linux run "ss -ltnup 'sport = :2647'", on macOS "lsof -nP -i :2647", and on Windows "netstat -ano | findstr :2647" to see the local process. From another machine, "nmap -p 2647 <host>" shows whether it is reachable.

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