CyberHunter
Local dataset, no network
// Other services

Port 2659: SNS Query

Port 2659 is assigned by IANA to sns-query (SNS Query).

2659

How sns-query works

Other services
client:2659sns-queryresponse client:2659sns-queryresponse

The client sends a request to port 2659 and the sns-query 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 2659 dangerous?

We have no specific security note for port 2659. 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 2659

ServicePortTransportDescriptionReferenceUpdated
sns-query 2659 TCP, UDP SNS Query - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2659, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2659'      # process listening on 2659
sudo lsof -nP -i :2659

macOS

sudo lsof -nP -i :2659

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2659 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2659
netstat -ano | findstr :2659

From another machine

nmap -p 2659 -sV <host>
sudo nmap -sU -p 2659 <host>
nc -zv <host> 2659

Block it in the firewall

sudo ufw deny 2659/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2659" -Direction Inbound -LocalPort 2659 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2659 used for?

Port 2659 is assigned by IANA to sns-query (SNS Query).

Is port 2659 TCP or UDP?

Port 2659 is registered for TCP and UDP.

Is it safe to open port 2659?

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 2659 is open?

On Linux run "ss -ltnup 'sport = :2659'", on macOS "lsof -nP -i :2659", and on Windows "netstat -ano | findstr :2659" to see the local process. From another machine, "nmap -p 2659 <host>" shows whether it is reachable.

05 Related
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