CyberHunter
Local dataset, no network
// Other services

Port 2046:

Port 2046 is assigned by IANA to sdfunc ().

2046

How sdfunc works

Other services
client:2046sdfuncresponse client:2046sdfuncresponse

The client sends a request to port 2046 and the sdfunc 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 2046 dangerous?

We have no specific security note for port 2046. 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 2046

ServicePortTransportDescriptionReferenceUpdated
sdfunc 2046 TCP, UDP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2046, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2046'      # process listening on 2046
sudo lsof -nP -i :2046

macOS

sudo lsof -nP -i :2046

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2046 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2046
netstat -ano | findstr :2046

From another machine

nmap -p 2046 -sV <host>
sudo nmap -sU -p 2046 <host>
nc -zv <host> 2046

Block it in the firewall

sudo ufw deny 2046/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2046" -Direction Inbound -LocalPort 2046 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2046 used for?

Port 2046 is assigned by IANA to sdfunc ().

Is port 2046 TCP or UDP?

Port 2046 is registered for TCP and UDP.

Is it safe to open port 2046?

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 2046 is open?

On Linux run "ss -ltnup 'sport = :2046'", on macOS "lsof -nP -i :2046", and on Windows "netstat -ano | findstr :2046" to see the local process. From another machine, "nmap -p 2046 <host>" shows whether it is reachable.

05 Related
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