Port 6159 (efb-aci)

IANA assigns port 6159 to efb-aci: EFB Application Control Interface.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference

efb-aci TCP EFB Application Control Interface Jonathan Schaaf -

Registry dates for this port: registered 2010-02-10.

Linux: is anything listening on TCP 6159?

sudo ss -tlnp 'sport = :6159'

Linux / macOS: which process owns the port

sudo lsof -nP -i :6159

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':6159 '

Windows (Command Prompt)

netstat -ano | findstr :6159

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6159 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 6159

From Windows

Test-NetConnection HOST -Port 6159

ufw

sudo ufw deny 6159/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 6159 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 6159 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 6159' -Direction Inbound -Protocol TCP -LocalPort 6159 -Action Block

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