Port 33890 (digilent-adept)

IANA assigns port 33890 to digilent-adept: Adept IP protocol.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference

digilent-adept TCP Adept IP protocol Digilent Inc -

Registry dates for this port: registered 2020-06-25.

Linux: is anything listening on TCP 33890?

sudo ss -tlnp 'sport = :33890'

Linux / macOS: which process owns the port

sudo lsof -nP -i :33890

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':33890 '

Windows (Command Prompt)

netstat -ano | findstr :33890

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 33890 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 33890

From Windows

Test-NetConnection HOST -Port 33890

ufw

sudo ufw deny 33890/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 33890 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 33890 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 33890' -Direction Inbound -Protocol TCP -LocalPort 33890 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.