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Port 3470 (jt400)

IANA assigns port 3470 to jt400.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
jt400 TCP jt400 - -
jt400 UDP jt400 - -

Check what is listening on port 3470

Linux: is anything listening on TCP 3470?
sudo ss -tlnp 'sport = :3470'
Linux: UDP 3470
sudo ss -ulnp 'sport = :3470'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3470
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3470 '
Windows (Command Prompt)
netstat -ano | findstr :3470
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3470 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3470
From Windows
Test-NetConnection HOST -Port 3470
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3470

Block port 3470 in the firewall

ufw
sudo ufw deny 3470/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3470 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3470 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3470' -Direction Inbound -Protocol TCP -LocalPort 3470 -Action Block
ufw
sudo ufw deny 3470/udp
iptables
sudo iptables -A INPUT -p udp --dport 3470 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3470 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3470' -Direction Inbound -Protocol UDP -LocalPort 3470 -Action Block

Related ports

3468ttcmremotectrl3469pluribus3471jt400-ssl3472jaugsremotec-1

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