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Port 4410 (itwo-server)

IANA assigns port 4410 to itwo-server: RIB iTWO Application Server.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
itwo-server TCP RIB iTWO Application Server Kristean Heisler 2 -

Registry dates for this port: registered 2009-12-16.

Check what is listening on port 4410

Linux: is anything listening on TCP 4410?
sudo ss -tlnp 'sport = :4410'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4410
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4410 '
Windows (Command Prompt)
netstat -ano | findstr :4410
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4410 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4410
From Windows
Test-NetConnection HOST -Port 4410

Block port 4410 in the firewall

ufw
sudo ufw deny 4410/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4410 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4410 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4410' -Direction Inbound -Protocol TCP -LocalPort 4410 -Action Block

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