CyberHunter
Local dataset, no network
// Other services

Port 2828: ITM License Manager

Port 2828 is assigned by IANA to itm-lm (ITM License Manager).

2828

How itm-lm works

Other services
client:2828itm-lmresponse client:2828itm-lmresponse

The client sends a request to port 2828 and the itm-lm 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 2828 dangerous?

We have no specific security note for port 2828. 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 2828

ServicePortTransportDescriptionReferenceUpdated
itm-lm 2828 TCP, UDP ITM License Manager - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2828, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2828'      # process listening on 2828
sudo lsof -nP -i :2828

macOS

sudo lsof -nP -i :2828

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2828 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2828
netstat -ano | findstr :2828

From another machine

nmap -p 2828 -sV <host>
sudo nmap -sU -p 2828 <host>
nc -zv <host> 2828

Block it in the firewall

sudo ufw deny 2828/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2828" -Direction Inbound -LocalPort 2828 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2828 used for?

Port 2828 is assigned by IANA to itm-lm (ITM License Manager).

Is port 2828 TCP or UDP?

Port 2828 is registered for TCP and UDP.

Is it safe to open port 2828?

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 2828 is open?

On Linux run "ss -ltnup 'sport = :2828'", on macOS "lsof -nP -i :2828", and on Windows "netstat -ano | findstr :2828" to see the local process. From another machine, "nmap -p 2828 <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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