Port 11103 (origo-sync)

IANA assigns port 11103 to origo-sync: OrigoDB Server Sync Interface.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference

origo-sync TCP OrigoDB Server Sync Interface Devrex Labs -

Registry dates for this port: registered 2013-03-29.

Linux: is anything listening on TCP 11103?

sudo ss -tlnp 'sport = :11103'

Linux / macOS: which process owns the port

sudo lsof -nP -i :11103

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':11103 '

Windows (Command Prompt)

netstat -ano | findstr :11103

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 11103 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 11103

From Windows

Test-NetConnection HOST -Port 11103

ufw

sudo ufw deny 11103/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 11103 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 11103 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 11103' -Direction Inbound -Protocol TCP -LocalPort 11103 -Action Block

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