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// Other services

Port 36424: Nq and Nq' Application Protocol

Port 36424 is assigned by IANA to nq-ap (Nq and Nq' Application Protocol).

36424

How nq-ap works

Other services
client:36424nq-apresponse client:36424nq-apresponse

The client sends a request to port 36424 and the nq-ap service answers.

Transport
SCTP
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 36424 dangerous?

We have no specific security note for port 36424. 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 36424

ServicePortTransportDescriptionReferenceUpdated
nq-ap 36424 SCTP Nq and Nq' Application Protocol - 2015-06-18

// source: IANA service name and port number registry

03 Check it

Which program uses port 36424, and is it reachable?

Linux

sudo ss -ltnup 'sport = :36424'      # process listening on 36424
sudo lsof -nP -i :36424

macOS

sudo lsof -nP -i :36424

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 36424 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 36424
netstat -ano | findstr :36424

From another machine

nmap -p 36424 -sV <host>
nc -zv <host> 36424

Block it in the firewall

sudo ufw deny 36424/sctp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 36424" -Direction Inbound -LocalPort 36424 -Protocol SCTP -Action Block  # Windows
04 FAQ
What is port 36424 used for?

Port 36424 is assigned by IANA to nq-ap (Nq and Nq' Application Protocol).

Is port 36424 TCP or UDP?

Port 36424 is registered for SCTP.

Is it safe to open port 36424?

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 36424 is open?

On Linux run "ss -ltnup 'sport = :36424'", on macOS "lsof -nP -i :36424", and on Windows "netstat -ano | findstr :36424" to see the local process. From another machine, "nmap -p 36424 <host>" shows whether it is reachable.

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