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// Other services

Port 36422: X2-Control Plane (3GPP)

Port 36422 is assigned by IANA to x2-control (X2-Control Plane (3GPP)).

36422

How x2-control works

Other services
client:36422x2-controlresponse client:36422x2-controlresponse

The client sends a request to port 36422 and the x2-control 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 36422 dangerous?

We have no specific security note for port 36422. 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 36422

ServicePortTransportDescriptionReferenceUpdated
x2-control 36422 SCTP X2-Control Plane (3GPP) - 2009-09-01
-36422-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 36422, and is it reachable?

Linux

sudo ss -ltnup 'sport = :36422'      # process listening on 36422
sudo lsof -nP -i :36422

macOS

sudo lsof -nP -i :36422

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 36422 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 36422
netstat -ano | findstr :36422

From another machine

nmap -p 36422 -sV <host>
nc -zv <host> 36422

Block it in the firewall

sudo ufw deny 36422/sctp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 36422" -Direction Inbound -LocalPort 36422 -Protocol SCTP -Action Block  # Windows
04 FAQ
What is port 36422 used for?

Port 36422 is assigned by IANA to x2-control (X2-Control Plane (3GPP)).

Is port 36422 TCP or UDP?

Port 36422 is registered for SCTP.

Is it safe to open port 36422?

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 36422 is open?

On Linux run "ss -ltnup 'sport = :36422'", on macOS "lsof -nP -i :36422", and on Windows "netstat -ano | findstr :36422" to see the local process. From another machine, "nmap -p 36422 <host>" shows whether it is reachable.

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