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Port 5841 (shiprush-d-ch)

IANA assigns port 5841 to shiprush-d-ch: Z-firm ShipRush interface for web access and bidirectional data.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
shiprush-d-ch TCP Z-firm ShipRush interface for web access and bidirectional data Z-Firm LLC -

Registry dates for this port: registered 2014-08-22.

Check what is listening on port 5841

Linux: is anything listening on TCP 5841?
sudo ss -tlnp 'sport = :5841'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5841
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5841 '
Windows (Command Prompt)
netstat -ano | findstr :5841
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5841 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5841
From Windows
Test-NetConnection HOST -Port 5841

Block port 5841 in the firewall

ufw
sudo ufw deny 5841/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5841 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5841 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5841' -Direction Inbound -Protocol TCP -LocalPort 5841 -Action Block

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