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// Other services

Port 2272: Meeting Maker Scheduling

Port 2272 is assigned by IANA to mmcal (Meeting Maker Scheduling).

2272

How mmcal works

Other services
client:2272mmcalresponse client:2272mmcalresponse

The client sends a request to port 2272 and the mmcal 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 2272 dangerous?

We have no specific security note for port 2272. 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 2272

ServicePortTransportDescriptionReferenceUpdated
mmcal 2272 TCP, UDP Meeting Maker Scheduling - 2004-12

// source: IANA service name and port number registry

03 Check it

Which program uses port 2272, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2272'      # process listening on 2272
sudo lsof -nP -i :2272

macOS

sudo lsof -nP -i :2272

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2272 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2272
netstat -ano | findstr :2272

From another machine

nmap -p 2272 -sV <host>
sudo nmap -sU -p 2272 <host>
nc -zv <host> 2272

Block it in the firewall

sudo ufw deny 2272/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2272" -Direction Inbound -LocalPort 2272 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2272 used for?

Port 2272 is assigned by IANA to mmcal (Meeting Maker Scheduling).

Is port 2272 TCP or UDP?

Port 2272 is registered for TCP and UDP.

Is it safe to open port 2272?

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 2272 is open?

On Linux run "ss -ltnup 'sport = :2272'", on macOS "lsof -nP -i :2272", and on Windows "netstat -ano | findstr :2272" to see the local process. From another machine, "nmap -p 2272 <host>" shows whether it is reachable.

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