Port 4348 (itose)

IANA assigns port 4348 to itose: ITOSE.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

itose TCP ITOSE Michael Haeuptle -

itose UDP ITOSE Michael Haeuptle -

Linux: is anything listening on TCP 4348?

sudo ss -tlnp 'sport = :4348'

Linux: UDP 4348

sudo ss -ulnp 'sport = :4348'

Linux / macOS: which process owns the port

sudo lsof -nP -i :4348

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':4348 '

Windows (Command Prompt)

netstat -ano | findstr :4348

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4348 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 4348

From Windows

Test-NetConnection HOST -Port 4348

UDP probe (no reply does not prove it is closed)

nc -vzu -w 5 HOST 4348

ufw

sudo ufw deny 4348/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 4348 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 4348 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 4348' -Direction Inbound -Protocol TCP -LocalPort 4348 -Action Block

ufw

sudo ufw deny 4348/udp

iptables

sudo iptables -A INPUT -p udp --dport 4348 -j DROP

nftables

sudo nft add rule inet filter input udp dport 4348 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 4348' -Direction Inbound -Protocol UDP -LocalPort 4348 -Action Block

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