CyberHunter
Local dataset, no network
// Other services

Port 828: itm-mcell-s

Port 828 is assigned by IANA to itm-mcell-s (itm-mcell-s).

828

How itm-mcell-s works

Other services
client:828itm-mcell-sresponse client:828itm-mcell-sresponse

The client sends a request to port 828 and the itm-mcell-s 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 828 dangerous?

We have no specific security note for port 828. 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 828

ServicePortTransportDescriptionReferenceUpdated
itm-mcell-s 828 TCP, UDP itm-mcell-s - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 828, and is it reachable?

Linux

sudo ss -ltnup 'sport = :828'      # process listening on 828
sudo lsof -nP -i :828

macOS

sudo lsof -nP -i :828

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 828 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 828
netstat -ano | findstr :828

From another machine

nmap -p 828 -sV <host>
sudo nmap -sU -p 828 <host>
nc -zv <host> 828

Block it in the firewall

sudo ufw deny 828/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 828" -Direction Inbound -LocalPort 828 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 828 used for?

Port 828 is assigned by IANA to itm-mcell-s (itm-mcell-s).

Is port 828 TCP or UDP?

Port 828 is registered for TCP and UDP.

Is it safe to open port 828?

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 828 is open?

On Linux run "ss -ltnup 'sport = :828'", on macOS "lsof -nP -i :828", and on Windows "netstat -ano | findstr :828" to see the local process. From another machine, "nmap -p 828 <host>" shows whether it is reachable.

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