Port 6116 (xtlserv)

IANA assigns port 6116 to xtlserv: XicTools License Manager Service.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference

xtlserv TCP XicTools License Manager Service Stephen R Whiteley -

Registry dates for this port: registered 2010-10-07.

Linux: is anything listening on TCP 6116?

sudo ss -tlnp 'sport = :6116'

Linux / macOS: which process owns the port

sudo lsof -nP -i :6116

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':6116 '

Windows (Command Prompt)

netstat -ano | findstr :6116

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6116 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 6116

From Windows

Test-NetConnection HOST -Port 6116

ufw

sudo ufw deny 6116/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 6116 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 6116 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 6116' -Direction Inbound -Protocol TCP -LocalPort 6116 -Action Block

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