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// Other services

Port 85: MIT ML Device

Port 85 is assigned by IANA to mit-ml-dev (MIT ML Device).

85

How mit-ml-dev works

Other services
client:85mit-ml-devresponse client:85mit-ml-devresponse

The client sends a request to port 85 and the mit-ml-dev 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 85 dangerous?

We have no specific security note for port 85. 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 85

ServicePortTransportDescriptionReferenceUpdated
mit-ml-dev 85 TCP, UDP MIT ML Device - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 85, and is it reachable?

Linux

sudo ss -ltnup 'sport = :85'      # process listening on 85
sudo lsof -nP -i :85

macOS

sudo lsof -nP -i :85

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 85 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 85
netstat -ano | findstr :85

From another machine

nmap -p 85 -sV <host>
sudo nmap -sU -p 85 <host>
nc -zv <host> 85

Block it in the firewall

sudo ufw deny 85/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 85" -Direction Inbound -LocalPort 85 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 85 used for?

Port 85 is assigned by IANA to mit-ml-dev (MIT ML Device).

Is port 85 TCP or UDP?

Port 85 is registered for TCP and UDP.

Is it safe to open port 85?

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 85 is open?

On Linux run "ss -ltnup 'sport = :85'", on macOS "lsof -nP -i :85", and on Windows "netstat -ano | findstr :85" to see the local process. From another machine, "nmap -p 85 <host>" shows whether it is reachable.

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