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Port 4141 (oirtgsvc)

IANA assigns port 4141 to oirtgsvc: Workflow Server.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
oirtgsvc TCP Workflow Server - -
oirtgsvc UDP Workflow Server - -

Check what is listening on port 4141

Linux: is anything listening on TCP 4141?
sudo ss -tlnp 'sport = :4141'
Linux: UDP 4141
sudo ss -ulnp 'sport = :4141'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4141
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4141 '
Windows (Command Prompt)
netstat -ano | findstr :4141
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4141 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4141
From Windows
Test-NetConnection HOST -Port 4141
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4141

Block port 4141 in the firewall

ufw
sudo ufw deny 4141/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4141 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4141 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4141' -Direction Inbound -Protocol TCP -LocalPort 4141 -Action Block
ufw
sudo ufw deny 4141/udp
iptables
sudo iptables -A INPUT -p udp --dport 4141 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4141 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4141' -Direction Inbound -Protocol UDP -LocalPort 4141 -Action Block

Related ports

4139thrtx4140cedros-fds, cedros_fds4142oidocsvc4143oidsr

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.