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Port 8021 (intu-ec-client)

IANA assigns port 8021 to intu-ec-client: Intuit Entitlement Client.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
intu-ec-client TCP Intuit Entitlement Client Daniel C McGloin -
intu-ec-client UDP Intuit Entitlement Client Daniel C McGloin -

Registry dates for this port: registered 2005-05.

Check what is listening on port 8021

Linux: is anything listening on TCP 8021?
sudo ss -tlnp 'sport = :8021'
Linux: UDP 8021
sudo ss -ulnp 'sport = :8021'
Linux / macOS: which process owns the port
sudo lsof -nP -i :8021
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':8021 '
Windows (Command Prompt)
netstat -ano | findstr :8021
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 8021 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 8021
From Windows
Test-NetConnection HOST -Port 8021
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 8021

Block port 8021 in the firewall

ufw
sudo ufw deny 8021/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 8021 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 8021 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 8021' -Direction Inbound -Protocol TCP -LocalPort 8021 -Action Block
ufw
sudo ufw deny 8021/udp
iptables
sudo iptables -A INPUT -p udp --dport 8021 -j DROP
nftables
sudo nft add rule inet filter input udp dport 8021 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 8021' -Direction Inbound -Protocol UDP -LocalPort 8021 -Action Block

Related ports

8019qbdb8020intu-ec-svcdisc8022oa-system8023arca-api

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.