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// Other services

Port 1899: MC2Studios

Port 1899 is assigned by IANA to mc2studios (MC2Studios).

1899

How mc2studios works

Other services
client:1899mc2studiosresponse client:1899mc2studiosresponse

The client sends a request to port 1899 and the mc2studios 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 1899 dangerous?

We have no specific security note for port 1899. 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 1899

ServicePortTransportDescriptionReferenceUpdated
mc2studios 1899 TCP, UDP MC2Studios - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1899, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1899'      # process listening on 1899
sudo lsof -nP -i :1899

macOS

sudo lsof -nP -i :1899

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1899 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1899
netstat -ano | findstr :1899

From another machine

nmap -p 1899 -sV <host>
sudo nmap -sU -p 1899 <host>
nc -zv <host> 1899

Block it in the firewall

sudo ufw deny 1899/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1899" -Direction Inbound -LocalPort 1899 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1899 used for?

Port 1899 is assigned by IANA to mc2studios (MC2Studios).

Is port 1899 TCP or UDP?

Port 1899 is registered for TCP and UDP.

Is it safe to open port 1899?

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 1899 is open?

On Linux run "ss -ltnup 'sport = :1899'", on macOS "lsof -nP -i :1899", and on Windows "netstat -ano | findstr :1899" to see the local process. From another machine, "nmap -p 1899 <host>" shows whether it is reachable.

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