CyberHunter
Local dataset, no network
// Other services

Port 2556: nicetec-nmsvc

Port 2556 is assigned by IANA to nicetec-nmsvc (nicetec-nmsvc).

2556

How nicetec-nmsvc works

Other services
client:2556nicetec-nmsvcresponse client:2556nicetec-nmsvcresponse

The client sends a request to port 2556 and the nicetec-nmsvc 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 2556 dangerous?

We have no specific security note for port 2556. 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 2556

ServicePortTransportDescriptionReferenceUpdated
nicetec-nmsvc 2556 TCP, UDP nicetec-nmsvc - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2556, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2556'      # process listening on 2556
sudo lsof -nP -i :2556

macOS

sudo lsof -nP -i :2556

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2556 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2556
netstat -ano | findstr :2556

From another machine

nmap -p 2556 -sV <host>
sudo nmap -sU -p 2556 <host>
nc -zv <host> 2556

Block it in the firewall

sudo ufw deny 2556/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2556" -Direction Inbound -LocalPort 2556 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2556 used for?

Port 2556 is assigned by IANA to nicetec-nmsvc (nicetec-nmsvc).

Is port 2556 TCP or UDP?

Port 2556 is registered for TCP and UDP.

Is it safe to open port 2556?

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 2556 is open?

On Linux run "ss -ltnup 'sport = :2556'", on macOS "lsof -nP -i :2556", and on Windows "netstat -ano | findstr :2556" to see the local process. From another machine, "nmap -p 2556 <host>" shows whether it is reachable.

05 Related
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