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// Other services

Port 8021: Intuit Entitlement Client

Port 8021 is assigned by IANA to intu-ec-client (Intuit Entitlement Client).

8021

How intu-ec-client works

Other services
client:8021intu-ec-clientresponse client:8021intu-ec-clientresponse

The client sends a request to port 8021 and the intu-ec-client 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 8021 dangerous?

We have no specific security note for port 8021. 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 8021

ServicePortTransportDescriptionReferenceUpdated
intu-ec-client 8021 TCP, UDP Intuit Entitlement Client - 2005-05

// source: IANA service name and port number registry

03 Check it

Which program uses port 8021, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8021'      # process listening on 8021
sudo lsof -nP -i :8021

macOS

sudo lsof -nP -i :8021

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8021 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8021
netstat -ano | findstr :8021

From another machine

nmap -p 8021 -sV <host>
sudo nmap -sU -p 8021 <host>
nc -zv <host> 8021

Block it in the firewall

sudo ufw deny 8021/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8021" -Direction Inbound -LocalPort 8021 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 8021 used for?

Port 8021 is assigned by IANA to intu-ec-client (Intuit Entitlement Client).

Is port 8021 TCP or UDP?

Port 8021 is registered for TCP and UDP.

Is it safe to open port 8021?

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 8021 is open?

On Linux run "ss -ltnup 'sport = :8021'", on macOS "lsof -nP -i :8021", and on Windows "netstat -ano | findstr :8021" to see the local process. From another machine, "nmap -p 8021 <host>" shows whether it is reachable.

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