CyberHunter
Local dataset, no network
// Directory & authentication

Port 2366: qip-login

Port 2366 is assigned by IANA to qip-login (qip-login).

2366

How qip-login works

Directory & authentication
userdirectoryqip-loginresponse userdirectoryqip-loginresponse

The client proves who it is on port 2366 and gets an answer (or a ticket) it can use with other services.

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
Directory & authentication
01 Security

Is port 2366 dangerous?

We have no specific security note for port 2366. Its risk depends on the program actually listening on it. General advice for directory & authentication services:

  • Keep directory and authentication services on internal networks.
  • Require signing or TLS and disable anonymous queries.
  • Monitor authentication failures for spraying and brute force.
02 Registry

IANA registry entries for port 2366

ServicePortTransportDescriptionReferenceUpdated
qip-login 2366 TCP, UDP qip-login - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2366, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2366'      # process listening on 2366
sudo lsof -nP -i :2366

macOS

sudo lsof -nP -i :2366

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2366 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2366
netstat -ano | findstr :2366

From another machine

nmap -p 2366 -sV <host>
sudo nmap -sU -p 2366 <host>
nc -zv <host> 2366

Block it in the firewall

sudo ufw deny 2366/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2366" -Direction Inbound -LocalPort 2366 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2366 used for?

Port 2366 is assigned by IANA to qip-login (qip-login).

Is port 2366 TCP or UDP?

Port 2366 is registered for TCP and UDP.

Is it safe to open port 2366?

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. Keep directory and authentication services on internal networks.

How do I check if port 2366 is open?

On Linux run "ss -ltnup 'sport = :2366'", on macOS "lsof -nP -i :2366", and on Windows "netstat -ano | findstr :2366" to see the local process. From another machine, "nmap -p 2366 <host>" shows whether it is reachable.

05 Related
:389 LDAP tcp · udp · high risk :636 LDAPS tcp · udp · moderate risk :88 Kerberos tcp · udp · high risk :3268 Global Catalog (LDAP) tcp · udp · high risk :1812 RADIUS udp · tcp · moderate risk :31 MSG Authentication tcp · udp :49 Login Host Protocol (TACACS) tcp · udp :56 XNS Authentication tcp · udp

Latest vulnerability news

All news