Port 9981 (pumpkindb)

IANA assigns port 9981 to pumpkindb: Event sourcing database engine with a built-in programming language.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference

pumpkindb TCP Event sourcing database engine with a built-in programming language Eventsourcing Inc -

Registry dates for this port: registered 2017-04-18.

Linux: is anything listening on TCP 9981?

sudo ss -tlnp 'sport = :9981'

Linux / macOS: which process owns the port

sudo lsof -nP -i :9981

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':9981 '

Windows (Command Prompt)

netstat -ano | findstr :9981

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 9981 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 9981

From Windows

Test-NetConnection HOST -Port 9981

ufw

sudo ufw deny 9981/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 9981 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 9981 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 9981' -Direction Inbound -Protocol TCP -LocalPort 9981 -Action Block

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