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// Other services

Port 5299: NLG Data Service

Port 5299 is assigned by IANA to nlg-data (NLG Data Service).

5299

How nlg-data works

Other services
client:5299nlg-dataresponse client:5299nlg-dataresponse

The client sends a request to port 5299 and the nlg-data 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 5299 dangerous?

We have no specific security note for port 5299. 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 5299

ServicePortTransportDescriptionReferenceUpdated
nlg-data 5299 TCP, UDP NLG Data Service - 2008-02-19

// source: IANA service name and port number registry

03 Check it

Which program uses port 5299, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5299'      # process listening on 5299
sudo lsof -nP -i :5299

macOS

sudo lsof -nP -i :5299

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5299 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5299
netstat -ano | findstr :5299

From another machine

nmap -p 5299 -sV <host>
sudo nmap -sU -p 5299 <host>
nc -zv <host> 5299

Block it in the firewall

sudo ufw deny 5299/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5299" -Direction Inbound -LocalPort 5299 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5299 used for?

Port 5299 is assigned by IANA to nlg-data (NLG Data Service).

Is port 5299 TCP or UDP?

Port 5299 is registered for TCP and UDP.

Is it safe to open port 5299?

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 5299 is open?

On Linux run "ss -ltnup 'sport = :5299'", on macOS "lsof -nP -i :5299", and on Windows "netstat -ano | findstr :5299" to see the local process. From another machine, "nmap -p 5299 <host>" shows whether it is reachable.

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