CyberHunter
Local dataset, no network
// Other services

Port 36443: M2 Application Part

Port 36443 is assigned by IANA to m2ap (M2 Application Part).

36443

How m2ap works

Other services
client:36443m2apresponse client:36443m2apresponse

The client sends a request to port 36443 and the m2ap 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 36443 dangerous?

We have no specific security note for port 36443. 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 36443

ServicePortTransportDescriptionReferenceUpdated
m2ap 36443 SCTP M2 Application Part - 2011-02-07

// source: IANA service name and port number registry

03 Check it

Which program uses port 36443, and is it reachable?

Linux

sudo ss -ltnup 'sport = :36443'      # process listening on 36443
sudo lsof -nP -i :36443

macOS

sudo lsof -nP -i :36443

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 36443 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 36443
netstat -ano | findstr :36443

From another machine

nmap -p 36443 -sV <host>
nc -zv <host> 36443

Block it in the firewall

sudo ufw deny 36443/sctp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 36443" -Direction Inbound -LocalPort 36443 -Protocol SCTP -Action Block  # Windows
04 FAQ
What is port 36443 used for?

Port 36443 is assigned by IANA to m2ap (M2 Application Part).

Is port 36443 TCP or UDP?

Port 36443 is registered for SCTP.

Is it safe to open port 36443?

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 36443 is open?

On Linux run "ss -ltnup 'sport = :36443'", on macOS "lsof -nP -i :36443", and on Windows "netstat -ano | findstr :36443" to see the local process. From another machine, "nmap -p 36443 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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