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// Other services

Port 2557: nicetec-mgmt

Port 2557 is assigned by IANA to nicetec-mgmt (nicetec-mgmt).

2557

How nicetec-mgmt works

Other services
client:2557nicetec-mgmtresponse client:2557nicetec-mgmtresponse

The client sends a request to port 2557 and the nicetec-mgmt 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 2557 dangerous?

We have no specific security note for port 2557. 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 2557

ServicePortTransportDescriptionReferenceUpdated
nicetec-mgmt 2557 TCP, UDP nicetec-mgmt - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2557, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2557'      # process listening on 2557
sudo lsof -nP -i :2557

macOS

sudo lsof -nP -i :2557

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2557 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2557
netstat -ano | findstr :2557

From another machine

nmap -p 2557 -sV <host>
sudo nmap -sU -p 2557 <host>
nc -zv <host> 2557

Block it in the firewall

sudo ufw deny 2557/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2557" -Direction Inbound -LocalPort 2557 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2557 used for?

Port 2557 is assigned by IANA to nicetec-mgmt (nicetec-mgmt).

Is port 2557 TCP or UDP?

Port 2557 is registered for TCP and UDP.

Is it safe to open port 2557?

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 2557 is open?

On Linux run "ss -ltnup 'sport = :2557'", on macOS "lsof -nP -i :2557", and on Windows "netstat -ano | findstr :2557" to see the local process. From another machine, "nmap -p 2557 <host>" shows whether it is reachable.

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