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Port 5411 (actnet)

IANA assigns port 5411 to actnet: ActNet.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
actnet TCP ActNet Simon Robillard -
actnet UDP ActNet Simon Robillard -

Check what is listening on port 5411

Linux: is anything listening on TCP 5411?
sudo ss -tlnp 'sport = :5411'
Linux: UDP 5411
sudo ss -ulnp 'sport = :5411'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5411
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5411 '
Windows (Command Prompt)
netstat -ano | findstr :5411
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5411 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5411
From Windows
Test-NetConnection HOST -Port 5411
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5411

Block port 5411 in the firewall

ufw
sudo ufw deny 5411/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5411 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5411 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5411' -Direction Inbound -Protocol TCP -LocalPort 5411 -Action Block
ufw
sudo ufw deny 5411/udp
iptables
sudo iptables -A INPUT -p udp --dport 5411 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5411 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5411' -Direction Inbound -Protocol UDP -LocalPort 5411 -Action Block

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