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Port 3941 (homeportal-web)

IANA assigns port 3941 to homeportal-web: Home Portal Web Server.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
homeportal-web TCP Home Portal Web Server Christian Beaumont -
homeportal-web UDP Home Portal Web Server Christian Beaumont -

Registry dates for this port: registered 2003-11.

Check what is listening on port 3941

Linux: is anything listening on TCP 3941?
sudo ss -tlnp 'sport = :3941'
Linux: UDP 3941
sudo ss -ulnp 'sport = :3941'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3941
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3941 '
Windows (Command Prompt)
netstat -ano | findstr :3941
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3941 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3941
From Windows
Test-NetConnection HOST -Port 3941
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3941

Block port 3941 in the firewall

ufw
sudo ufw deny 3941/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3941 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3941 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3941' -Direction Inbound -Protocol TCP -LocalPort 3941 -Action Block
ufw
sudo ufw deny 3941/udp
iptables
sudo iptables -A INPUT -p udp --dport 3941 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3941 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3941' -Direction Inbound -Protocol UDP -LocalPort 3941 -Action Block

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